Vietnam War veteran Rod Knutson talks about his experiences. Knutson served in the U.S. Navy and U.S. Marines. He was born and raised in Billings, Montana, graduating from Billings Senior High in 1956. He was one of about 651 prisoners of war who returned to the United States alive. Reports peg the number who died in prison at around 114. He spent 2,673 days as a prisoner of war — more than seven years — in Hanoi.