6 Mysterious Airplane Disappearances In Aviation History

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The shocking disappearance of Malaysia Airlines Flight MH370 (picture above shows the airplane involved) has captured the attention of millions around the world as the search for the airplane and its passengers and crew continues. What happened to the flight's 239 passengers and crew after the plane left Kuala Lumpur on Saturday? It is becoming an increasingly desperate question as the days pass.

But it's hardly the first mystery of its kind. While it's extremely rare that a flight simply vanishes with barely a trace, aviation history has seen its fair share of enigmatic disappearances and unfortunate flights that literally flew off the radar. Here are six of the half-solved and unsolved airline mysteries that kept investigators clueless for years.