A B-1B Lancer, assigned to the 37th Expeditionary Bomb Squadron, deployed from Ellsworth Air Force Base, S.D., arrives at Andersen AFB, Guam, Dec. 4, 2017. Two U.S. Air Force B-1B bombers conducted a continuous bomber presence mission on return to Andersen AFB from Royal Australian Air Force Base Amberley, Australia, where they have been since late November supporting U.S. Pacific Command's Enhanced Air Cooperation initiative. (U.S. Air Force photo by Tech. Sgt. Richard P. Ebensberger)