Staff Sgt. Nicholas Aitchison, a weapons load crew member assigned to the 37th Aircraft Maintenance Unit, verifies the installation of a Mark 82 General Purpose bomb during a B-1 bomber load competition at Ellsworth Air Force Base, S.D., March 17, 2017. During the load competition, the 34th and 37th AMUs showcased their skills by racing against time to load explosives on a B-1 bomber accurately and safely. (U.S. Air Force photo by Airman Nicolas Z. Erwin)