Maj. Gen. John C. Flournoy Jr., 4th Air Force commander, administers the oath of enlistment to Master Sgt. Sean Barnum, 709th Airlift Squadron, July 12, 2015, at Dover Air Force Base, Del. Barnum, an 18-year C-5 A, B, and M loadmaster, re-enlisted for 6 years. Also during the general's three-day stay, he met with Airmen through various forums, toured facilities and participated in a fitness challenge event. (U.S. Air Force photo/Master Sgt. Paul Adkins)