Above the radar
A KC-135 Stratotanker from the 939th Air Refueling WIng refuels an E-3 Sentry Airborne Warning and Control System. The E-3 contains a radar subsystem that permits surveillance from the earth's surface up into the stratosphere, over land or water. The radar has a range of more than 200 miles for low-flying targets and farther for aerospace vehicles flying at medium to high altitudes. (U.S. Air Force Photo By Tech. Sgt. Gregory Guant)