For several months, a dank 6.5-by-7-foot cell at the Hanoi Hilton served as a crucible that tested the limits of human endurance for retired Air Force Col. Leon Ellis and three of his fellow prisoners.

William Butler, veteran and volunteer, dies
William Butler was an Air Force captain who spent 5 1/2 years as a prisoner of war in North Vietnam – some of it in the infamous “Hanoi Hilton” – before returning home to Calistoga to become a veterinarian who dedicated his life to helping fellow veterans and others in need.

