JOINT BASE ELMENDORF-RICHARDSON, Alaska -- Airmen assigned to the 3rd Air Support Operations Squadron, conduct small-arms live-fire sustainment training at Joint Base Elmendorf-Richardson, Alaska, Nov. 29, 2017. During the live-fire training exercise, the 3rd ASOS Airmen honed their marksmanship skills, transitioning between firing the M9 pistol and M4 carbine. (U.S. Air Force photos by Alejandro Peña)