JOINT BASE ELMENDORF-RICHARDSON, Alaska -- An F-15 Eagle taxis to the runway before conducting a simulated combat sortie over the Joint Pacific Alaska Range Complex during RED FLAG-Alaska, April 21, 2011. The JPARC covers more than 67,000 square miles and enables the military to have the largest air-ground training complex in America. The F-15 is assigned to the 44th Fighter Squadron, Kadena Air Base, Japan. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)