FORT POLK, La. – From left, Master Sgt. Justin Halterman and Tech. Sgt. Sarah Earp, aerial porters from the 570th Contingency Response Group at Travis Air Force Base, Calif., watch a lightning storm in the distance while manning a security observation post at Geronimo Landing Zone on Fort Polk, La. Oct 15, 2012. The CRG was supporting Joint Readiness Training Center 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)