Three F-16 Fighting Falcons from the Iowa Air National Guard sit on the flightline at Eielson Air Force Base, Alaska, during exercise Northern Edge 2006 on Tuesday, June 6, 2006. The joint training exercise hosted by Alaskan Command is one of a series of U.S. Pacific Command exercises that prepare joint forces to respond to crises in the Asian Pacific region. (U.S. Air Force photo/Staff Sgt. Joshua Strang)