U.S. Army Staff Sgt. Darwin Sessions, a UH-60 helicopter

U.S. Army Staff Sgt. Darwin Sessions, a UH-60 helicopter repairer with the 3rd Assault Helicopter Battalion, 4th Combat Aviation Brigade, 4th Infantry Division, teaches Romanian soldiers the proper hand signals they need to understand to perform successful air assault training at Mihail Kogalniceanu Airbase, Romania, Jan. 16, 2019. Allied and partner forces train together frequently from strategically positioned bases in Europe that are critical for a timely and coordinated response to any aggression. (U.S. Army photo by Staff Sgt. Kris Bonet)