This slide shown on a video screen during a news conference at 

This slide shown on a video screen during a news conference at the National Transportation Safety Board (NTSB) in Washington, Thursday, Feb. 7, 2013, shows a comparison of an exemplar battery with the Japan Airlines Boeing 787 battery. The NTSB provided an update on their investigation into the Jan. 7 fire that occurred on a Japan Airlines Boeing 787 at Logan International Airport in Boston. (AP Photo/Ann Heisenfelt)
Associated Press
This slide shown on a video screen during a news conference at the National Transportation Safety Board (NTSB) in Washington, Thursday, Feb. 7, 2013, shows a comparison of an exemplar battery with the Japan Airlines Boeing 787 battery. The NTSB provided an update on their investigation into the Jan. 7 fire that occurred on a Japan Airlines Boeing 787 at Logan International Airport in Boston. (AP Photo/Ann Heisenfelt)
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