Staff Sgt. Jefferey Sales, a 28th Security Forces Squadron combat arms instructor, throws his top onto the pool deck at the Bellamy Fitness Center on Ellsworth Air Force Base, S.D., Sept. 20, 2019. Participants of the German Armed Forces Proficiency Test swam 100 meters in uniform, then undressed while treading water. The event was completed once participants successfully landed their uniforms onto the pool deck. (U.S. Air Force photo by Airman 1st Class Christina Bennett)