NELLIS AIR FORCE BASE, Nev. -- An E-3 Sentry Airborne Warning and Control System takes off while a Navy F-18 crew prepares for a mission here during Joint Red Flag 2005. About 10,000 U.S. and coalition forces are participating in the exercise, which runs through April 2. The Sentry is from the 513th Air Control Group at Tinker Air Force Base, Okla. (U.S. Air Force photo by Staff Sgt Chrissy FitzGerald)