In 2003, a 727 took off from Angola with two mechanics on board. It hasn’t been seen since!
Ben Padilla, an aircraft mechanic and his helper were working on the 727 to get it flight-ready.
Padilla had a private pilot's license, but his helper had no experience.
A 727 requires 3 pilots to fly it. Without permission or contact with the airport, they plane began to taxi down the runway erratically and flew off towards the Atlantic never to be seen again.
The incident sent the US into a frenzy believing it could be another terrorist attack. They've since dropped their investigation.
It is the largest airplane to ever disappear without a trace.