U.S. Airmen assigned to the 100th Security Forces Squadron conclude the Leatherface Defender Agile Combat Employment Course field training exercise near Thetford, England, June 27, 2024. Airmen participated in a 26-hour exercise to secure and occupy a helicopter landing zone, while defending it from various attacks. ACE creates a proactive and reactive operational scheme of maneuver executed within threat timelines to increase resiliency and survivability while generating combat power.