Airmen 1st Class Hayden Wilson, left, and Senior Airman Mathew Gatton, response force members assigned to the 28th Security Forces Squadron, perform sniper training in the Black Hills, S.D., Jan. 23, 2018. The Advanced Designated Marksman course is a challenging two-week course that teaches advanced marksmanship and military scouting skills to Air Force security forces members. (U.S. Air Force photo by Airman 1st Class Donald C. Knechtel)