U.S. Air Force 2nd Lt. Brandon Clark, 20th Expeditionary Maintenance Squadron assistant officer in charge ,(right) explains features of the B-52H Stratofortress landing gear to members of the Royal Australian Air Force’s (RAAF) 13th Squadron at RAAF Base Darwin, Australia, April 4, 2018. RAAF Darwin and members of 13th Squadron hosted two B-52H Stratofortress bombers during a week-long Enhanced Air Cooperation exercise, designed to improve interoperability between U.S. Air Force aircrews and Australian joint tactical air controllers. Australian service members had the opportunity to tour the visiting aircraft and familiarize themselves with features of the long-range bomber. (U.S. Air Force photo by Staff Sgt. Alexander W. Riedel)