Air Force Reservist Master Sgt. Christopher Enfinger, 47th Security Forces Squadron alternate operations superintendent, poses at the 47th SFS on Laughlin Air Force Base, Texas, July 8, 2015. When not serving in his reservist capacity, Enfinger is one of only 25 officers, detectives, and sergeants assigned to the San Antonio Police Department Gang Unit who is responsible for tracking, documenting and monitoring more than 10,000 gang members and over 30 different gangs throughout San Antonio. (U.S. Air Force photo by Tech Sgt. Steven R. Doty)