Patrick McDonald looks up the hatch of a 307th Bomb Wing B-52H Stratofortress before attempting to climb into the cockpit during a tour, June 4, 2014, Barksdale Air Force Base, La. McDonald, a U.S. Army veteran, was paralyzed in 1991 as the result of an accident while serving with the Army in South Korea, joined the American300 Tours to share his experience with fellow military service members as part of the tour's 'Never Quit Series'. (U.S. Air Force photo by Master Sgt. Greg Steele/Released)