U.S. soldiers, 2nd Battalion, 138th Field Artillery, site security team, participate in M4 carbine qualifications at the police range on Camp Lemonnier, Djibouti, Feb. 5, 2013. SST soldiers must qualify annually on their rifles to stay current with U.S. Army standards. (U.S. Air Force photo by Airman 1st Class Nicholas Byers/Released)