U.S. Air Force Capt. Keane Carpenter, an aircraft commander with the 14th Airlift Squadron, Joint Base Charleston, S.C., performs a walk around safety check of his assigned C-17 Globemaster III aircraft on the flight line at Scott Air Force Base, Illinois, Sept. 10, 2017.
The crew prepared to move relief supplies to Puerto Rico in response to Hurricane Irma. (U.S. Air Force photo by Master Sgt. Joshua L. DeMotts) Original public domain image from Flickr