Australian pilot Captain John Francis Bartels (R) looks at the damage to a Qantas Airways plane after it made an emergency landing at the Manila International airport in this July 25, 2008 file photo. Australian air safety investigators on August 29, 2008 blamed an oxygen bottle for a mid-air explosion which blew a minivan-size hole in the side of the Qantas 747, but said they don't know why the bottle blew up. The aircraft suffered a sudden loss of cabin pressure during a flight from Hong Kong to Melbourne on July 25, forcing the aircraft to make an emergency descent before diverting to the Philippines, where it landed safely in Manila. REUTERS/Handout/Files (PHILIPPINES)
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