A U.S. infrared satellite detected a mid-air 'heat flash" over the Sinai desert at the same time a doomed Russian plane crashed in the area, media outlets were reporting Tuesday.
NBC News, citing an unnamed senior defense official, said U.S. intelligence analysts believe the flash could have been an explosion on the aircraft itself, most likely a fuel tank or a bomb. The official said there was no indication that a surface-to-air missile was involved in the crash. CBS was r...
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