A patch commemorating 2,000 flight hours in the F-16 Fighting Falcon is displayed on the arm of U.S. Air Force Col Tad Clark, 52nd Fighter Wing vice wing commander, at Spangdahlem Air Base, Germany, Sept. 6, 2018. A career F-16 pilot, Col Clark has maintained his flying status and remains fully qualified to carry out a variety of missions. (U.S. Air Force photo by 1st Lt. Casey Rodriguez)