Searchers have found the wreckage from a Pan Am flight that plunged into the ocean off Puerto Rico in 1952, an accident that killed 52 and led to requirements for the passenger safety briefings given ...

The 1952 Clipper Endeavor was just found using an autonomous sonar drone nearly 70 years after the tragic crash left 52 passengers dead.

All aboard the plane initially survived the impact, but the tail section broke off, and the aircraft began flooding and sinking within three minutes.