Staff Sgt. Nicholas Heckler, 47th Security Forces Squadron military working dog handler, prepares for a long day in the field at Laughlin Air Force Base, Texas, April 17, 2019. The 47th SFS changed up the tempo with an exercise that challenged their tactics, teamwork and physical fitness as they were put head to head with a simulated opposing force. (U.S. Air Force photo by Senior Airman Benjamin N. Valmoja)