Airmen welcome new 521st AMOW commander
Maj. Gen. Frederick Martin, U.S. Air Force Expeditionary Center commander, passes the 521st Air Mobility Operations Wing flag to Col. Thomas Cooper during a change-of-command ceremony at Ramstein Air Base, Germany, June 14, 2016. With the passing of the flag, Cooper took command of more than 2,000 Airmen throughout Europe and Africa. (U.S. Air Force photo/Staff Sgt. Armando A. Schwier-Morales)