U.S. Air Force Airman 1st Class Naigo Chambers, 39th Security Forces Squadron member, fires an M4 carbine rifle during the Combat Arms training and Maintenance Qualifications course Nov. 16, 2017, at Incirlik Air base, Turkey. During the course, Naigo received the expert marksman ribbon for achieving an above-average score. (U.S. Air Force photo by Senior Airman Kristan Campbell)