Master Sgt. Delorean Sheridan, 21st Special Tactics Squadron combat controller, describes traits that epitomize Staff Sgt. Forrest Sibley with members of the 21st STS and the special operations community in a memorial service at Pope Army Airfield, N.C. Sept. 3, 2015. Sibley, 31, was killed at a vehicle checkpoint near Camp Antonik, Afghanistan, Aug. 26, 2015. He was a combat controller at the 21st STS and deployed in support of Operation Freedom’s Sentinel. (U.S. Air Force photo by Lt. Col. James R. Wilson/Released)