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A U.S. Air Force B-1B Lancer, assigned to the 37th Expeditionary Bomb Squadron, deployed from Ellsworth Air Force Base (AFB), S.D., refuels over the South Pacific Oct. 2, 2017. The Lancer conducted a bilateral training mission with Royal Australian Air Force Joint Terminal Attack Controllers as part of Exercise Black Dagger, a training exercise designed to foster increased interoperability between Australia and the U.S.