FORT POLK, La. – U.S. Air Force Col. Darren Sprunk, 570th Contingency Response Group commander, speaks to his team leaders during a shift change in the command post on Geronimo Landing Zone, Fort Polk, La. Oct 15, 2012. The CRG was supporting Joint Readiness Training Exercise Decisive Action. The exercise includes emphasis on joint forcible entry, phased deployment with an airborne parachute operation, a combined noncombatant evacuation, combine arms maneuver, wide area security, unconventional warfare and unified land operations in a joint, interagency, intergovernmental and multinational environment. (U.S. Air Force photo by Tech. Sgt. Parker Gyokeres) (Released)