An F-15C Falcon from the 18th Aggressor Squadron, Eielson Air Force Base, Alaska, flies over a mountain range in Alaska during an excercise evolution that is a part of Northern Edge 2011. The U.S. Pacific Command directed excercise is taking place in the Joint Pacific Alaska Range Complex and has brought together nearly 6,000 participants from the U.S. Army, Air Force, Marine Corps, Navy and Coast Guard.