Acevedo says he was one of six medics among the 350 U.S. soldiers at Berga.

CNN: WW II vet held in Nazi slave camp breaks silence: 'Let it be known'

Political prisoners from other countries were held at Berga separate from the Americans.

CNN: WW II vet held in Nazi slave camp breaks silence: 'Let it be known'

Vogel and Cohen, both Jewish, were forced to stand in front of the barracks at Berga, with no food or water.

CNN: After 63 years, vet learns of brother's death in Nazi slave camp