On this day in 2014, Malaysian Flight 370 departed Kuala Lumpur International Airport bound for Beijing. The last verbal communication with the flight crew occurred 38 minutes into the flight. Shortly after, the plane veered sharply west and was lost by air traffic control radar. Malaysian military radar tracked it for another hour as it continued over the Malay Peninsula before the plane and its 239 passengers and crew vanished forever.

The mysterious disappearance triggered the greatest search in aviation history, sparking wild speculation and conspiracy theories. Satellite data later confirmed that the plane continued south over the Indian Ocean for at least another 6 hours, presumably crashing after exhausting its fuel. Eventually, some debris was discovered washed up on various beaches in the West Indian Ocean, though it provided few clues to the plane’s fate. Unless the flight data recorder is recovered, we are unlikely to ever know what really happened.