'Stay Home': Northeast Shuts Down as Blizzard Hits

A blizzard of possibly historic proportions began battering the Northeast today, and could bring more than two feet of snow and strong winds that could shut down densely populated cities such as Boston and New York City.

A storm from the west joined forces with one from the south to form a nor'easter that will sit and spin just off the East Coast, affecting more than 43 million Americans. Wind gusts were forecast to reach 50 to 60 mph from Philadelphia to Boston.

Cape Cod, Mass., could possibly see 75 mph gusts. Boston and other parts of New England could see more than two feet of snow by Saturday.

The storm showed the potential for such ferocity that Massachusetts Gov. Deval Patrick declared a state of emergency Friday afternoon and signed an executive order banning vehicular traffic on roads in his state effective at 4 p.m. ET. It was believed that the last time the state enacted such a ban was during the blizzard of 1978. Violating the ban could result in a penalty of up to a year in jail and a $500 fine.

"[It] could definitely be a historic winter storm for the Northeast," said Adrienne Leptich of the National Weather Service in Upton, N.Y. "We're looking at very strong wind and heavy snow and we're also looking for some coastal flooding."

Airlines began shutting down operations Friday afternoon at major airports in the New York area as well as in Boston, Portland, Maine, Providence, R.I., and other Northeastern airports. By early evening Friday, more than 4,300 flights had been cancelled on Friday and Saturday, according to FlightAware. Airlines hoped to resume flights by Saturday afternoon, though normal schedules were not expected until Sunday.

Weather Forecast: Northeast Braces for Monster Blizzard Watch Video

Winter Storm to Hit Northeast With Winds and Snow Watch Video

The snow fell heavily Friday afternoon in New York City and 12 to 14 inches were expected. Mayor Michael Bloomberg said clearing the roads was his main concern, and the city readied 1,700 snow plows and 250,000 tons of salt to clear the streets.

New York City was expecting up to 14 inches of snow, which started falling early this morning, though the heaviest amounts were expected to fall at night and into Saturday. Wind gusts of 55 mph were expected in New York City.

"Stay off the city streets. Stay out of your cars and stay at home while the worst of the storm is on us," Bloomberg said Friday.

Connecticut Gov. Dannel P. Malloy declared a state of emergency, deploying National Guard troops across the state to assist in rescues and other emergencies. Schools and state courthouses were closed, and all flights after 1:30 p.m. at Bradley Airport, north of Hartford, Conn., were cancelled. The state's largest utility companies planned for the possibility that 30 percent of customers -- more than 400,000 homes and businesses -- would lose power.

PHOTOS: Northeast Braces for Snowstorm

Boston, Providence, R.I., Hartford, Conn., and other New England cities canceled school today.

"Stay off the streets of our city. Basically, stay home," Boston Mayor Tom Menino warned Thursday.

On Friday, Menino applauded the public's response.

"I'm very pleased with the compliance with the snow emergency," he said. "You drive down some of the roadways, you don't see one car."

As of 4:30 p.m. Friday, 837 National Guard soldiers and airmen under state control had been activated in Connecticut, Massachusetts and New York in anticipation of the storm -- 552 in Massachusetts, 235 in Connecticut and 50 in New York. The extra hands were helping with roadways, transportation, making wellness checks on residents and other emergency services.

Beach erosion and coastal flooding is possible from New Jersey to Long Island, N.Y., and into New England coastal areas. Some waves off the coast could reach more than 20 feet.

Blizzard warnings were posted for parts of New Jersey and New York's Long Island, as well as portions of Massachusetts, Rhode Island and Connecticut, including Hartford, New Haven, Conn., and Providence. The warnings extended into New Hampshire and Maine.

To the south, Philadelphia was looking at a possible 4 to 6 inches of snow.

In anticipation of the storm, Amtrak said its Northeast trains would stop running this afternoon.

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Microsoft wins latest round in Motorola patent case

SAN FRANCISCO: A federal judge on Thursday tossed out more than a dozen patent infringement claims filed against Microsoft by Google-owned Motorola Mobility.

US District Court Judge James Robart, in Microsoft's home state of Washington, sided with the software colossus, dismissing 13 claims of infringement on a trio of Motorola patents involving digital video encoding and decoding, according to court records.

The Motorola patents were evidently not specific enough regarding the computer code involved, according to the documents.

The decision significantly narrowed the case.

If the remaining claims survive a similar legal challenge, Microsoft would likely be entitled to pay a reasonable rate to license what is considered a "standards-essential" technology, according to intellectual property specialist Florian Mueller, of FossPatents.com.

- AFP/xq

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FAA approves Boeing test flights of grounded 787 Dreamliner

The first Boeing 787 Dreamliner takes off on its initial flight in 2009.

(Credit:
Daniel Terdiman/CNET)

Boeing was granted permission today to conduct test flights of its 787 Dreamliner as the aircraft maker tries to determine the cause of battery fires that have kept the fleet of planes grounded around the world.

The test flights will be subject to a number of restrictions, the Federal Aviation Administration said today, including limiting the flights to specific airspace over unpopulated areas. Other conditions include pre-flight testing and inspections, and in-flight monitoring.

"The traveling public's safety is our highest priority," the FAA said in a statement. "These test flights will be an important part of our efforts to ensure the safety of passengers and return these aircraft to service."

The Seattle-based aircraft builder said it hopes to resume flight test activities soon using its fifth flight test airplane, although it didn't say how many flights were planned.

"While our work to determine the cause of the recent battery incidents continues in coordination with appropriate regulatory authorities and investigation agencies, we are confident that 787 is safe to operate for this flight test activity," the company said in a statement. "As additional precautions, we have implemented additional operating practices for test flights, including a one-time preflight inspection of the batteries, monitoring of specific battery related status messages, and a recurring battery inspection."

The FAA ordered airlines to ground their fleets of the much-hyped Dreamliner last month after a series of fires involving the aircraft's lithium-ion batteries. The action came on the heels of Japanese carriers All Nippon Airways and Japan Airlines grounding their 787s after a battery fire forced the evacuation of an ANA flight.

A similar incident occurred January 7 when a JAL 787 on the ground at Boston's Logan International Airport caught fire. In response, the FAA announced it would conduct a comprehensive review of the aircraft, which features innovative use of composite materials.

The burned auxiliary power unit battery from a JAL Boeing 787 that caught fire at Boston's Logan International Airport.

(Credit:
NTSB)

The National Transportation Safety Board announced today it had traced the JAL battery fire to a single cell that short circuited and then spread to other cells. The safety board further said it will focus on the design and certification requirements of the battery system.

The NTSB said a Boeing risk assessment conducted during the plane's certification process found that the likelihood of a battery smoke emission event would occur on the 787 less than once in every 10 million flight hours.

Noting that there have already been two incidents in less than 100,000 flight hours, NTSB Chairman Deborah A.P. Hersman said in a statement that "the failure rate was higher than predicted as part of the certification process and the possibility that a short circuit in a single cell could propagate to adjacent cells and result in smoke and fire must be reconsidered."

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Asteroid to Make Closest Flyby in History

Talk about too close for comfort. In a rare cosmic encounter, an asteroid will barnstorm Earth next week, missing our planet by a mere 17,200 miles (27,700 kilometers).

Designated 2012 DA14, the space rock is approximately 150 feet (45 meters) across, and astronomers are certain it will zip harmlessly past our planet on February 15—but not before making history. It will pass within the orbits of many communications satellites, making it the closest flyby on record. (Read about one of the largest asteroids to fly by Earth.)

"This is indeed a remarkably close approach for an asteroid this size," said Paul Chodas, a research scientist at NASA's Jet Propulsion Laboratory Near Earth Object (NEO) program office in Pasadena, California.

"We estimate that an asteroid of this size passes this close to the Earth only once every few decades."

The giant rock—half a football field wide—was first spotted by observers at the La Sagra Observatory in southern Spain a year ago, soon after it had just finished making a much more distant pass of the Earth at 2.6 million miles (4.3 million kilometers) away.

This time around however, on February15 at 2:24 pm EST, the asteroid will be passing uncomfortably close—ten times closer than the orbit of the moon—flying over the eastern Indian Ocean near Sumatra (map). (Watch: "Moon 101.")

Future Impact?

Chodas and his team have been keeping a close eye on the cosmic intruder, and orbital calculations of its trajectory show that there is no chance for impact.

But the researchers have not yet ruled out future chances of a collision. This is because asteroids of this size are too faint to be detected until they come quite close to the Earth, said Chodas.

"There is still a tiny chance that it might hit us on some future passage by the Earth; for example there is [a] 1-in-200,000 chance that it could hit us in the year 2080," he said.

"But even that tiny chance will probably go away within the week, as the asteroid's orbit gets tracked with greater and greater accuracy and we can eliminate that possibility."

Earth collision with an object of this size is expected to occur every 1,200 years on average, said Donald Yeomans, NEO program manager, at a NASA news conference this week.

DA14 has been getting closer and closer to Earth for quite a while—but this is the asteroid's closest approach in the past hundred years. And it probably won't get this close again for at least another century, added Yeomans.

While no Earth impact is possible next week, DA14 will pass 5,000 miles inside the ring of orbiting geosynchronous weather and communications satellites; so all eyes are watching the space rock's exact trajectory. (Learn about the history of satellites.)

"It's highly unlikely they will be threatened, but NASA is working with satellite providers, making them aware of the asteroid's pass," said Yeomans.

Packing a Punch

Experts say an impact from an object this size would have the explosive power of a few megatons of TNT, causing localized destruction—similar to what occurred in Siberia in 1908.

In what's known as the "Tunguska event," an asteroid is thought to have created an airburst explosion which flattened about 750 square miles (1,200 square kilometers) of a remote forested region in what is now northern Russia (map).

In comparison, an impact from an asteroid with a diameter of about half a mile (one kilometer) could temporarily change global climate and kill millions of people if it hit a populated area.

Timothy Spahr, director of the Minor Planet Center at Cambridge, Massachusetts, said that while small objects like DA14 could hit Earth once a millennia or so, the largest and most destructive impacts have already been catalogued.

"Objects of the size that caused the extinction of the dinosaurs have all been discovered," said Spahr. (Learn about what really happened to the dinosaurs.)

A survey of nearly 9,500 near-Earth objects half a mile (one kilometer) in diameter is nearly complete. Asteroid hunters expect to complete nearly half of a survey of asteroids several hundred feet in diameter in the coming years.

"With the existing assets we have, discovering asteroids rapidly and routinely, I continue to expect the world to be safe from impacts in the future," added Spahr.

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Alleged Cop-Killer Has Calif. Region on Edge

The truck owned and driven by suspected cop killer Christopher Dorner during his alleged rampage through the Los Angeles area was found deserted and in flames on the side of Bear Mountain, Calif., this afternoon.

Heavily armed SWAT team members descended onto Bear Mountain from a helicopter manned with snipers today to investigate the fire. The San Bernadino Sheriff's Department confirmed the car was Dorner's.

Dorner, a former Los Angeles police officer and Navy reservist, is believed to have killed one police officer and injured two others early this morning in Riverside, Calif. He is also accused of killing two civilians on Sunday after releasing a scathing "manifesto" alleging grievances committed by the police department while he worked for it and warning of coming violence toward cops.

Read More About Chris Dorner's Allegations Against the LAPD

Heavily armed officers spent much of Thursday searching for signs of Dorner, investigating multiple false leads into his whereabouts and broadcasting his license plate and vehicle description across the California Highway System.

Around 3:45 p.m. ET, police responded to Bear Mountain, where two fires were reported, and set up a staging area in the parking lot of a ski resort. They did not immediately investigate the fires, but sent a small team of heavily armed officers up in the helicopter to descend down the mountain toward the fire.

Christopher Dorner: Ex-Cop Wanted in Killing Spree Watch Video

Engaged California Couple Found Dead in Car Watch Video

Missing Ohio Mother: Manhunt for Ex-Boyfriend Watch Video

The officers, carrying machine guns and searching the mountain for any sign of Dorner, eventually made it to the vehicle and identified it as belonging to Dorner. They have not yet found Dorner.

Late this afternoon, CNN announced that Dorner had sent a package containing his manifesto and a DVD to its offices.

PHOTOS: Former LAPD Officer Suspected in Shootings

Police officers across Southern California were on the defensive today, scaling back their public exposure, no longer responding to "barking-dog calls" and donning tactical gear outdoors.

Police departments have stationed officers in tactical gear outside police departments, stopped answering low-level calls and pulled motorcycle patrols off the road in order to protect officers who might be targets of Dorner's alleged rampage.

"We've made certain modifications of our deployments, our deviations today, and I want to leave it at that, and also to our responses," said Chief Sergio Diaz of the police department in Riverside, Calif., where the officers were shot. "We are concentrating on calls for service that are of a high priority, threats to public safety, we're not going to go on barking dog calls today."

Sgt. Rudy Lopez of the Los Angeles Police Department said Dorner is "believed to be armed and extremely dangerous."

Early Thursday morning, before they believe he shot at any police officers, Dorner allegedly went to a yacht club near San Diego, where police say he attempted to steal a boat and flee to Mexico.

He aborted the attempted theft when the boat's propeller became entangled in a rope, law enforcement officials said. It was then that he is believed to have headed to Riverside, where he allegedly shot two police officers.

"He pointed a handgun at the victim [at the yacht club] and demanded the boat," said Lt. David Rohowits of the San Diego Police Department.

Police say the rifle marksman shot at four officers in two incidents overnight, hitting three of them: one in Corona, Calif., and the two in Riverside, Calif.

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Today on New Scientist: 6 February 2013

Open Richard III DNA evidence for peer review

A good case has been made that a skeleton unearthed from a car park is that of the last Plantagenet king of England - it's time to share the data

Universal bug sensor takes guesswork out of diagnosis

A machine that can identify all bacteria, viruses and fungi known to cause disease in humans should speed up diagnosis and help to reduce antibiotic resistance

Choking China: The struggle to clear Beijing's air

As pollution levels return to normal in China's capital after a record-breaking month of smog, what can be done to banish the smog?

Genes mix across borders more easily than folk tales

Analysing variations in folk tales using genetic techniques shows that people swap genes more readily than stories, giving clues to how cultures evolve

Sleep and dreaming: Slumber at the flick of a switch

Wouldn't it be wonderful to pack a good night's sleep into fewer hours? Technology has the answer - and it could treat depression and even extend our lives too

Closest Earth-like planet may be 13 light years away

A habitable exoplanet should be near enough for future telescopes to probe its atmosphere for signs of life

Lifelogging captures a real picture of your health

How can lifelogging - wearing a camera round your neck to record your every move - reveal what's healthy and unhealthy in the way we live?

Musical brains smash audio algorithm limits

The mystery of how our brains perceive sound has deepened, now that musicians have broken a limit on sound perception imposed by the Fourier transform

Magnitude 8 earthquake strikes Solomon Islands

A major earthquake has caused a small tsunami in the Pacific Ocean, killing at least five people

Nuclear knock-backs on UK's new reactors and old waste

Plans to build new reactors in the UK are stalling as yet another company pulls out, and there is still nowhere to store nuclear waste permanently

Amateur astronomer helps Hubble snap galactic monster

An amateur astronomer combined his pictures with images from the Hubble archive to reveal the true nature of galactic oddball M106

Nightmare images show how lack of sleep kills

Fatigue has been blamed for some of worst human-made disasters of recent decades. Find out more in our image gallery

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Qantas chief backs troubled Dreamliner

SYDNEY: Qantas chief Alan Joyce has thrown his support behind Boeing and its troubled 787 Dreamliner, reinforcing his commitment to introducing the planes to the Australian flag-carrier's fleet.

The next generation plane suffered a series of glitches last month, prompting a global alert from the US Federal Aviation Administration that led to the worldwide grounding of all 50 operational 787s.

Qantas has 14 of the planes on order, with delivery due this year, and has retained options and purchase rights for 50 B787s of either -8 or -9 variants available for delivery from 2016.

Joyce said nothing had changed to alter the plans.

"We believe that Boeing are a great airline manufacturing company, they're a great engineering company and they will fix this problem eventually," broadcaster ABC quoted him as saying on its website on Thursday.

"They're still producing the aircraft, so the production line hasn't stopped. They have stopped delivering aircraft to customers.

"Our aircraft are due to arrive, the first one in August. We haven't been advised of any delay at this stage."

On Wednesday, the US National Transportation Safety Board said the results of its Dreamliner probe will likely not be known for weeks.

"We're probably weeks away from being able to tell people what happened and what needs to be changed," NTSB chief Deborah Hersman said in Washington.

Hersman said investigators were "proceeding with a lot of care" in investigating the cause of a January 7 lithium-ion battery fire on a Japan Airlines (JAL) 787 that occurred as the unoccupied plane sat on the tarmac at Boston's Logan airport.

The most concerning issues uncovered so far were short circuits and thermal runaway, a chemical reaction that produces uncontrollably rising temperatures, she said.

The battery problem, and another battery incident on an All Nippon Airways 787 on January 16, led to the global grounding of all Dreamliners in service until the issue is fixed.

- AFP/xq

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Manage collapsed window errors in Lion or Mountain Lion

Apple's autosave and resume features in OS X offer a great way to preserve your workflow if a program crashes or you simply need to quit it. However, these features do somewhat depend on the system's display output being constant, and may have some problems if you regularly change the system's display format.

If you use a MacBook system and plug in external monitors or if you regularly change display resolutions, then you might find certain programs (particularly Apple's TextEdit) will sometimes gather all windows into a collapsed group at some location on your display. This bug does not happen all the time and is therefore likely difficult to track and fix. However, if it happens to you then there are some things you can do to restore your windows and at least review them.

When this error occurs, windows will be collapsed on top of each other, which can make them difficult to review and close.

(Credit:
Screenshot by Topher Kessler/CNET)

1. Arrange in front
   The first option is to arrange the windows in front of your other applications, which is a quick way to manage any sort of window clutter in OS X. To do this, make the program the foremost one, then click the Window menu. The default option for handling window organization in this menu will be "bring all to front." However, if you hold the Option key this will change to "Arrange in front," which will arrange the windows in a descending ladder organization.

   While this still maintains the windows in a collapsed state, it does allow you easier access to them.



2. Zoom all
   A second option is to zoom all windows for the affected program, which should restore their window bounds to a size that should reveal at least some of their contents. To do this, again hold the Option key and choose "Zoom All" from the same Window menu. Unfortunately in some cases, this will maximize the windows instead of resizing them to fit their contents. This can cause some frustration; however, repeating this procedure should revert it.


3. Restore a prior saved state
   This problem with windows collapsing ultimately revolves around OS X saving window locations in its Resume feature. While beneficial it will also overwrite a valid saved window state with the faulty one that has all windows collapsed. However, if you have Time Machine enabled (and especially if you have local snapshots active for systems on the go), then you can restore the most recent saved state for the program before the error occurred, to revert it and have your windows appear normally. (This is likely only beneficial for those with many windows open.)

   To do this, go to the user library folder (hold the Option button and choose Library from the Go menu), then open the folder called "Saved Application State." Then locate the folder for your given program (e.g., for TextEdit, it would be "com.apple.TextEdit.savedState") and then either invoke Time Machine and restore the entire folder from a time before the error occurred, or enter the folder and restore its entire contents. Do this when the affected program is closed, and when you next open it the prior saved state should be used.

---

Questions? Comments? Have a fix? Post them below or !
Be sure to check us out on Twitter and the CNET Mac forums.

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Humans Swap DNA More Readily Than They Swap Stories

Jane J. Lee

Once upon a time, someone in 14th-century Europe told a tale of two girls—a kind one who was rewarded for her manners and willingness to work hard, and an unkind girl who was punished for her greed and selfishness.

This version was part of a long line of variations that eventually spread throughout Europe, finding their way into the Brothers Grimm fairytales as Frau Holle, and even into Shakespeare's The Merchant of Venice. (Watch a video of the Frau Holle fairytale.)

In a new study, evolutionary psychologist Quentin Atkinson is using the popular tale of the kind and unkind girls to study how human culture differs within and between groups, and how easily the story moved from one group to another.

Atkinson, of the University of Auckland in New Zealand, and his co-authors employed tools normally used to study genetic variation within a species, such as people, to look at variations in this folktale throughout Europe.

The researchers found that there were significant differences in the folktale between ethnolinguistic groups—or groups bound together by language and ethnicity. From this, the scientists concluded that it's much harder for cultural information to move between groups than it is for genes.

The study, published February 5 in Proceedings of the Royal Society B, found that about 9 percent of the variation in the tale of the two girls occurred between ethnolinguistic groups. Previous studies looking at the genetic diversity across groups in Europe found levels of variation less than one percent.

For example, there's a part of the story in which the girls meet a witch who asks them to perform some chores. In different renditions of the tale, the meeting took place by a river, at the bottom of a well, or in a cave. Other versions had the girls meeting with three old men or the Virgin Mary, said Atkinson.

Conformity

Researchers have viewed human culture through the lens of genetics for decades, said Atkinson. "It's a fair comparison in the sense that it's just variation across human groups."

But unlike genes, which move into a population relatively easily and can propagate randomly, it's harder for new ideas to take hold in a group, he said. Even if a tale can bridge the "ethnolinguistic boundary," there are still forces that might work against a new cultural variation that wouldn't necessarily affect genes.

"Humans don't copy the ideas they hear randomly," Atkinson said. "We don't just choose ... the first story we hear and pass it on.

"We show what's called a conformist bias—we'll tend to aggregate across what we think everyone else in the population is doing," he explained. If someone comes along and tells a story a little differently, most likely, people will ignore those differences and tell the story like everyone else is telling it.

"That makes it more difficult for new ideas to come in," Atkinson said.

Cultural Boundaries

Atkinson and his colleagues found that if two versions of the folktale were found only six miles (ten kilometers) away from each other but came from different ethnolinguistic groups, such as the French and the Germans, then those versions were as different from each other as two versions taken from within the same group—say just the Germans—located 62 miles (100 kilometers) away from each other.

"To me, the take-home message is that cultural groups strongly constrain the flow of information, and this enables them to develop highly local cultural traditions and norms," said Mark Pagel, of the University of Reading in the U.K., who wasn't involved in the new study.

Pagel, who studies the evolution of human behavior, said by email that he views cultural groups almost like biological species. But these groups, which he calls "cultural survival vehicles," are more powerful in some ways than our genes.

That's because when immigrants from a particular cultural group move into a new one, they bring genetic diversity that, if the immigrants have children, get mixed around, changing the new population's gene pool. But the new population's culture doesn't necessarily change.

Atkinson plans to keep using the tools of the population-genetics trade to see if the patterns he found in the variations of the kind and unkind girls hold true for other folktale variants in Europe and around the world.

Humans do a lot of interesting things, Atkinson said. "[And] the most interesting things aren't coded in our DNA."

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NTSB to Challenge 787 Battery Tests

The National Transportation Safety Board will publicly question at a news conference planned for Thursday morning in Washington whether the Federal Aviation Administration and Boeing adequately tested the lithium batteries that have caught fire on Dreamliners in the U.S. and Japan, ABC News has learned exclusively from a government source.

The NTSB will say its investigation into the fire on the 787 at Boston's Logan Field showed gaps between what happened with the battery in testing and what happened with the battery confiscated by the NTSB in Boston, a source told ABC News.

The NTSB investigation followed the mid-January announcement that the FAA ordered the grounding of all Boeing 787 Dreamliner jets until their U.S. operator proved that batteries on the planes are safe.

The pre-certification test results were found to be different than what happened during NTSB investigation, the source said. The agency, charged with investigating civil aviation accidents in the U.S., is expected to question whether the Boeing tests certified by the FAA were "robust enough."

The NTSB told ABC News that its investigation is looking at the battery failure and what caused it, as well as the certification processes, emphasizing that the FAA has been "very cooperative in allowing our investigators access to the certification review that they are undertaking on their own."

Akio Kon/Bloomberg/Getty Images

787 Dreamliner Grounded, Passengers Forced to Evacuate Watch Video

Boeing 787 Dreamliner Deemed Safe Despite Mishaps Watch Video

Both the airplane maker and the FAA are responsible for the testing, the government source said.

This morning, the chairwoman of the NTSB, Deborah Hersman, told reporters at a breakfast briefing that the initial investigation into the batteries found "multiple cells where we saw uncontrolled chemical chain reaction," including short circuiting and thermal runaway, "and those features are not what we would have expected to see in a brand new battery, in a brand new airplane.

"We're evaluating assessments that were made, whether or not those assessments were accurate, whether they were complied with and whether more needs to be done," Hersman said. "We want to make sure the design is robust, that the oversight, the manufacturing process, that those are all adequate -- and so that will be a part of our continuing investigation to determine the failure modes, what may have caused it and what can mitigate against that in the future."

The lithium batteries, one power source for the 787, have never before been used in commercial airliners and were a source of concern from the beginning because of they operate at high temperature.

"I would not want to categorically say that these batteries are not safe," Hersman said. "Any new technology, any new design, there are going to be some inherent risks. ... I would say that, in the past, the NTSB have expressed concerns about the risks and recommended mitigation measures."

Hersman added that the fire seen on board the JAL Dreamliner in Boston in "shows us some risks that were not addressed."

In a statement to ABC News, Boeing said: "Lithium ion batteries were selected after a careful review of available alternatives because they best met the performance and design objectives of the 787. We've used them successfully in other applications, such as satellites, for nearly a decade, and they are used on other aircraft, spacecraft and naval vessels.

"With that said," Boeing added, "we constantly challenge our assumptions and decisions across all of our products when new information becomes available. Nothing we learned during the design of the 787 or since has led us to change our fundamental assessment of the technology. It merits emphasis that the 787 has extensive protections in place to ensure the ability for safe flight to continue even in the presence of a battery failure."

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