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An F-16 Aggressor takes off from the Nellis flight line during a Red Flag Exercise, March 3, 2010. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise is conducted on the 15,000-square-mile Nevada Test and Training Range, north of Las Vegas. (U.S. Air Force Photo by Staff Sgt. William P. Coleman/RELEASED)