Nellis Open House 2014
A security forces Airmen stands guard in front of an E-3 Sentry airborne warning and control system, or AWACS, at the Nellis Open House Nov. 7, 2014, at Nellis Air Force Base, Nev. The AWACS provides situational awareness of friendly, neutral and hostile activity, command and control of an area of responsibility, battle management of theater forces, all-altitude and all-weather surveillance of the battle space, and early warning of enemy actions during joint, allied, and coalition operations. (U.S. Air Force photo by Tech. Sgt. Nadine Barclay)