U.S. Air Force Staff Sgt. Charles Duval, 633rd Security Forces Squadron base defense operations center controller, tests night vision goggles prior to night fire marksmanship at Fort Eustis, Va., Oct. 30, 2014. Along with firing during daylight, 633rd SFS Airmen performed night firing to enhance capabilities in low-light situations. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)