An M110 Semi-Automatic Sniper System (SASS) is ready for use as Soldiers from the 4th Brigade Combat Team (Airborne), 25th Infantry Division, prepare to qualify at Grezelka Range, June 25, 2013. During the five-week U.S. Army Mobile Sniper School, students were graded on marksmanship using the M24 Sniper System, M110 SASS, and the M107 .50 Caliber Long Range Sniper Rifle. Students were also trained and graded in range estimation, target detection, and stalking techniques, and written exams. (U.S. Air Force photo/Percy G. Jones)