Rappelling Training Airmen rappel from a UH-60 Black Hawk helicopter during annual rappelling refresher training in Tulsa, Okla., Dec. 14, 2016. The airmen are assigned to the Oklahoma Air National Guard’s 137th Security Forces Squadron and 138th Security Forces Squadron. Air National Guard photo by Tech. Sgt. Drew A. Egnoske SHARE IMAGE: Download Image: Full Size (1.02 MB) Tags: training, Guard, AIR FORCE, Airmen Photo By: Tech. Sgt. Drew Egnoske VIRIN: 161214-Z-QX378-003A.JPG Photo Gallery