The F-15EX, the Air Force’s newest fighter aircraft, is flanked by an F-15E and F-15C in the distance March 11 at Eglin Air Force Base, Fla. The just-arrived aircraft will be the first Air Force aircraft to be tested and fielded from beginning to end through combined developmental and operational tests. The 40th Flight Test Squadron and the 85th Test and Evaluation Squadron personnel are responsible for testing the aircraft. (U.S. Air Force photo/Samuel King Jr.)