Members of the Royal Australian Air Force (RAAF) listen to a B-52H Stratofortress aircrew member during a tour of the aircraft at RAAF Base Darwin, Australia, April 4, 2018. The exchange was conducted as part of a week-long Enhanced Air Cooperation (EAC) exercise. The EAC comprises a range of air exercises and training activities between Australian and U.S. aircrews and support teams. (U.S. Air Force photo by Staff Sgt. Alexander W. Riedel)