U.S. Air Force Tech. Sgt. Starlight Lesher, 307th Security Forces Squadron, reads the serial number of an M4 rifle during an inventory inspection on Jan. 6, 2015, 2015. The inspection was in preparation for a mobility exercise the 307th Bomb Wing will undergo during the January Unit Training Assembly. (U.S. Air Force photo by Master Sgt. Greg Steele/Released)