Military working dogs train to ensure they’re ready for action at a moments’ notice.
Vietnam in HD - Operation Lam Son
Operation Lam Son 719 -- When the U.S. attacked the Ho Chi Minh Trail in Laos, they avoided sending in ground troops, leaving that to South Vietnamese fighters. Pilots like Bob Clewell supported the battle, flying in the largest helicopter operation in the war. Learn more at http://www.history.com/shows/vietnam-in-hd