ELLSWORTH AIR FORCE BASE, S.D. – Tech. Sgt. Joseph Wengler, 28th Security Forces Squadron flight chief, cleans his M-4 carbine, Nov. 22. Sergeant Wengler’s seven-member team, which competed in the Global Strike Challenge at Barksdale Air Force Base, La., earned an overall second place in their category. (U.S. Air Force photo/ Senior Airman Jarad A. Denton)