Wreckage found of Pan Am plane crash that helped lead to today's safety briefings on every flight

The wreckage of Pan Am's Clipper Endeavor, a 1952 crash that influenced modern flight safety briefings, was discovered off Puerto Rico after 74 years. The crash, which killed 52 people due to evacuation failures, was located using an autonomous sonar drone, with findings potentially aiding families of other missing flights like Malaysia Airlines 370.