Ever Vigilant

Nov. 28, 2012 | Air Force photo by SSgt. Christopher Hubenthal

An E-3 Sentry airborne warning and control system aircraft from the 963rd Airborne Air Control Squadron at Tinker AFB, Okla., flies over the Nevada landscape during a sortie at the Green Flag-West 13-2 exercise at Nellis AFB, Nev., Nov. 1, 2012. (