A U-2 Dragon Lady flies above the Sierra Nevada Mountain Range, Calif., March 23, 2016. The U-2 is a single-seat, single-engine, high-altitude/near space reconnaissance and surveillance aircraft which delivers critical imagery and signals intelligence to decision makers throughout all phases of conflict, including peacetime indications and warnings, low-intensity conflict, and large-scale hostilities. (U.S. Air Force photo by Staff Sgt. Robert M. Trujillo)