U.S. Air Force Senior Airman Demetrius Yancey, foreground, and other Airmen with the 116th Security Forces Squadron (SFS), Georgia Air National Guard, take part in counterinsurgency (COIN) operations training at the Catoosa Training Site in Tunnel Hill, Ga., June 29, 2014. The 116th SFS received extensive classroom and hands-on training to hone their skills. During COIN training, the Airmen used a simulated village to practice building, breaching and clearing operations.