What to know about the mystery of Malaysia Airlines Flight 370 as the search resumes

On Wednesday, the Malaysian government said a vessel began a new search operation for the missing plane, reigniting hopes the aircraft might finally be found. A previous, massive search in the southern Indian Ocean, where the jet is believed to have gone down, turned up almost nothing. The Boeing 777 disappeared from air-traffic radar 39 minutes after departing Kuala Lumpur for Beijing on March 8, 2014.