A U.S. Airman walks down the stairs from a KC-10 Extender

A U.S. Airman walks down the stairs from a KC-10 Extender Sept. 19, 2019, at Travis Air Force Base, California. The KC-10 was one of 46 U.S. aircraft that joined aircraft from 29 international partners for Mobility Guardian 2019, Air Mobility Command’s largest full-spectrum readiness exercise. MG19 validates the Air Force’s readiness to conduct mobility operations against threats described in the 2018 National Defense Strategy. (U.S. Air Force photo by 2nd Lt. R. Michael Longoria)