In 1940 a smoking, battle-scarred B-24 Liberator bomber known as the Tulsamerican crashed into the choppy seas off the coast of Croatia, entombing three of its occupants under 100 feat of water. For years they were lost to their world-and their families. But in 2017, seventy years after the crash, the Department of Defense discovered the plane's location and, aided by the Croatian Navy and some of the world's leading underwater archaeologists, set to work to investigate the wreckage. Were the B-24's truly as dangerous as the nickname "the Flying Coffin" suggested? And what does that mean for the recovery of the fallen airmen?