Staff Sgt. Stephen Horton, 36th Security Forces Squadron NCO in charge of resource protection and physical security, assembles an M9 pistol during annual qualification training July 7, 2016, at Andersen Air Force Base, Guam. Prior to firing, students are taught how to handle their weapon, take it apart and conduct preventative maintenance. (U.S. Air Force photo by Airman 1st Class Jacob Skovo)