An F-16C Fighting Falcon flies during a training sortie Jan. 6, 2020, over Luke Air Force Base, Ariz. The F-16 is a single-engine multirole fighter aircraft with approximately 3,000 operational aircraft in service in 25 countries. Luke AFB Airmen employ the base’s 77 F-16s and 92 F-35s to train the world’s greatest fighter pilots and combat ready Airmen. (U.S. Air Force photo by Airman 1st Class Brooke Moeder)