A B-52 Stratofortress crew chief assigned to the 20th Expeditionary Aircraft Maintenance Squadron marshals his aircraft on the flightline Aug. 22, 2015, at Andersen Air Force Base, Guam. Bomber crews with the 20th Expeditionary Bomb Squadron are part of U.S. Pacific Command’s continuous bomber presence and support ongoing operations in the Indo-Asia-Pacific region. (U.S. Air Force photo by Staff Sgt. Alexander W. Riedel/Released)