Vietnamese Air Force Col. Pham Minh Tuan uses binoculars on board a flying aircraft during a mission to search for the missing Malaysia Airlines flight MH370 in the Gulf of Thailand, Thursday, March 13, 2014. With no distress call, no sign of wreckage and very few answers, the disappearance of the Malaysia Airlines plane is turning into one of the biggest aviation mysteries since Amelia Earhart vanished over the Pacific Ocean in 1937. (AP Photo)
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