An MQ-9 Reaper drone crashed late last year into the Mediterranean Sea because it lost a propeller, ultimately destroying the entire unmanned aircraft, according to a newly released incident report. The new details, released late last month by Air Combat Command, revealed some of the circumstances that caused the multimillion-dollar aircraft to be destroyed but still left unanswered questions as the drone was unrecoverable in the sea. "The mishap resulted in a complete loss of the aircraft,