Long-lost Pan Am crash wreckage found decades after deadly disaster that reshaped airline safety

Wreckage was found from a Pan Am flight that ditched in the ocean off Puerto Rico in 1952, a crash that killed 52 people and helped lead to mandatory passenger safety briefings on commercial flights. Searchers recently found the wreckage of the DC-4 by using an autonomous underwater vehicle equipped with high-resolution sonar to locate the fuselage and separated tail in nearly 2,000 feet of water. The Clipper Endeavor aircraft made a hard landing in the ocean after losing engine power shortly af