A B-1 bomber takes off From Ellsworth Air Force Base, S.D., to perform a flyover in honor of U.S. Army Air Corps Staff Sgt. David Thatcher, June 27, 2016. Thatcher was the engineer gunner of a B-25 medium-range bomber on Crew #7, “The Ruptured Duck,” during the Doolittle Raid on April 18, 1942. (U.S. Air Force photo by Airman 1st Class Denise M. Nevins/Released)