An Airman from the 37th Aircraft Maintenance Unit marshals a B-1 bomber out to the flightline at 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, one of the last remaining Doolittle Raiders, passed away from complications of a stroke on June 22. (U.S. Air Force photo by Airman 1st Class Denise M. Nevins/Released)