FILE - In this Jan. 24,... Pictures

FILE - In this Jan. 24, 2013 file photo, Joseph Kolly, director National Transportation Safety Board (NTSB) Office of Research and Engineering, holds an fire-damaged battery casing from the Japan Airlines Boeing 787 Dreamliner that caught fire at Logan International Airport in Boston, at the NTSB laboratory in Washington. An investigation of a battery fire aboard a Boeing 787 shows mechanics and firefighters made repeated, unsuccessful attempts to put out the blaze through smoke so thick they couldnÂt see the battery. The documents released Thursday by the National Transportation Safety Board paint a more dangerous picture of the Jan. 7 fire than previously portrayed.  (AP Photo/Manuel Balce Ceneta, File) ORG XMIT: WX109
FILE - In this Jan. 24, 2013 file photo, Joseph Kolly, director National Transportation Safety Board (NTSB) Office of Research and Engineering, holds an fire-damaged battery casing from the Japan Airlines Boeing 787 Dreamliner that caught fire at Logan International Airport in Boston, at the NTSB laboratory in Washington. An investigation of a battery fire aboard a Boeing 787 shows mechanics and firefighters made repeated, unsuccessful attempts to put out the blaze through smoke so thick they couldn’t see the battery. The documents released Thursday by the National Transportation Safety Board paint a more dangerous picture of the Jan. 7 fire than previously portrayed. (AP Photo/Manuel Balce Ceneta, File) ORG XMIT: WX109

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