An Army paratrooper provides security as another paratrooper uses a field radio to keep in touch with other elements of his unit during a joint operational access exercise at Fort Bragg, N.C., on June 27, 2011. The paratroopers are assigned to the 82nd Airborne Division?s 1st Brigade Combat Team. The three-day exercise began with a mass tactical parachute drop of vehicles and paratroopers.