Preflight check, US Air Force Photo, US Army Photo

U.S. Air Force Senior Airman Kevin M. Yeash, a C-17 Globemaster III loadmaster with the 732nd Airlift Squadron, 514th Air Mobility Wing, performs preflight checks before a flight to the Steven F. Udvar-Hazy Center in Chantilly, Va., June 16, 2017. The 514th is participating in the annual Innovations in Flight Family Day and Outdoor Aviation Display at the Center, which is the companion facility to the Smithsonian National Air and Space Museum in Washington, D.C. The C-17 is assigned to the 305th Air Mobility Wing and is maintained and flown by the 514th Air Mobility Wing, Air Force Reserve Command and the 305th located at Joint Base McGuire-Dix-Lakehurst, N.J. (U.S. Air Force photo by Master Sgt. Mark C. Olsen/Released)