U.S. Air Force F-22A Raptors assigned to the 27th Expeditionary Fighter Squadron and Royal Australian Air Force F-35A Lighting IIs assigned to the 75th Squadron await a hot pit refuel at RAAF Base Curtin, Australia. A hot pit refuel is an Agile Combat Employment concept designed to sustain airpower by expediting refueling efforts. his display of interoperable ACE execution in an austere location demonstrated seamless force integration and efficient collaboration between Allies. (U.S. Air Force photo by Staff Sgt. Spencer Tobler)