
D-Day training mission went horribly wrong —
Troops prepare for Exercise Tiger at Slapton Sands in England in April 1944.

D-Day training mission went horribly wrong —
A new sonar image taken by Hydroid's REMUS 100 AUV shows the sunken LST 531.

D-Day training mission went horribly wrong —
These are the first high-definition sonar images taken of the sunken ships.

D-Day training mission went horribly wrong —
LST 289 was hit by a torpedo during Exercise Tiger. The ship eventually made it back to shore.

D-Day training mission went horribly wrong —
"I could hear the German torpedo boats buzzing near us, but I couldn't see them," says James Brown, who was aboard LST 289.

D-Day training mission went horribly wrong —
Louis Bolton poses with his wife, Wilma, before he was sent to England. Bolton was killed during Exercise Tiger.

D-Day training mission went horribly wrong —
Paul Gerolstein visits Utah Beach in 2009. He hadn't been back since 1944.

D-Day training mission went horribly wrong —
LST 507 sank after being hit by a German torpedo.

D-Day training mission went horribly wrong —
"This is sacred ground," says Laurie Bolton, whose uncle, Louis, was killed during Exercise Tiger. She believes Bolton's remains rest at the bottom of the English Channel.

