U.S. Navy sailors from Tactical Electronic Warfare Squadron 139 out of Naval Air Facility Washington, D.C., prepare to launch an EA-6B Prowler aircraft at Nellis Air Force Base, Nev., during Red Flag 10-3 on March 2, 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.