The USS Eagle 56 was only five miles off the coast of Maine when it exploded.
The World War I-era patrol boat split in half, then slipped beneath the surface of the North Atlantic. The Eagle 56 had been carrying a crew of 62. Rescuers pulled 13 survivors from the water that day. It was April 23, 1945, just two weeks before the surrender of Nazi Germany.
The United States Navy classified the disaster as an accident, attributing the sinking to a blast in the boiler room. In 2001, that ruling was changed to reflect the sinking as a deliberate act of war, perpetuated by German submarine U-853, a u-boat belonging to Nazi Germany's Kriegsmarine.