Flight 370 was on its way from Kuala Lumpur to Beijing on March 8, 2014, with 239 people on board when it disappeared.Official accounts concluded the Boeing 777 executed a dramatic U-turn less than an hour into its planned flight, before plummeting into the Indian Ocean.The search carried out for this plane was the most expensive in aviation history.Disputed pieces of debris were found, but the plane was not.Proposed theories included the pilot crashing on purpose, a drop in air pressure leaving the crew unconscious, a lightning strike or lithium batteries in the cargo hold catching fire.There have also been suggestions it was shot down during a military exercise between the US and Thailand and was hijacked.The Bermuda Triangle has long.
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