Casey Conklin joined the 3rd Ranger Battalion as a medic, because he always believed they were the toughest group around. After his experience in the Battle of Mosul in Iraq and receiving his Ranger tab, he doesn't question how tough he is. After returning home, he finds that he still must challenge himself to stay healthy and redefine toughness at home.

Casey Conklin: Ranger Battalion

John Baumhackl recalls the early days of the Vietnam War when more and more troops were being sent into combat every month. In 1968, John's number came up and he was drafted into the conflict. Buying a camera at his company store before shipping off, he captured many battles while in a helicopter. John was near the front lines when President Nixon made the controversial decision to push into Cambodia. In John's view, this saved American lives.