U.S. Air Force Senior Airman John Potter, crew chief, 22nd Aircraft Maintenance Squadron, McConnell, K.S., inspects a KC-135 Stratotanker during Exercise Mobility Guardian, Joint Base Lewis-McChord, Wash., Aug. 5, 2017. 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. The exercise is designed to sharpen Airmen's skills in support of combatant commander requirements. (U.S. Air Force photo by Airman 1st Class Gracie I. Lee)