Airmen from the 4th Fighter Wing, Seymour Johnson Air Force Base, North Carolina, ready an F-15E Strike Eagle aircraft for flight, May 4, 2016, at Hill AFB, Utah. The F-15Es, along with other fighter and bomber aircraft, participated in the U.S. Air Force air-to-ground weapons evaluation known as Combat Hammer. (U.S. Air Force photo by R. Nial Bradshaw)