A Royal Air Force A400M Atlas taxis before takeoff Aug. 3, 2017, at Joint Base Lewis-McChord, Wash. The A400 has been in service with the RAF since 2014. More than 3,000 Airmen, Soldiers, Sailors, Marines and international partners converged on the state of Washington in support of Mobility Guardian. The exercise is intended to test the abilities of the Mobility Air Forces to execute rapid global mobility missions in dynamic, contested environments. Mobility Guardian is Air Mobility Command’s premier exercise, providing an opportunity for the Mobility Air Forces to train with joint and international partners in airlift, air refueling, aeromedical evacuation and mobility support. (U.S. Air Force photo by Airman 1st Class Erin McClellan)