A U.S. Air Force E-3 Sentry airborne early warning and control aircraft is refueled by a KC-135 Stratotanker over the Middle East. The E-3 can coordinate with air and ground forces over a large area.

A US Air Force E-3 Sentry aircraft was refueled by a KC-135 Stratotanker in the Middle East. The E-3 Sentry is designed for airborne early warning and control, capable of coordinating forces over a wide area.