EIELSON AIR FORCE BASE, Alaska -- Tech Sgt. Filmon Yosief inspects a helmet during NORTHERN EDGE 2011 June 13, Eielson Air Force Base, Alaska. NORTHERN EDGE provides effective, flexible and capabilities-centered joint forces ready for deployment worldwide and enables real world proficiency in detection and tracking of units at sea, in the air and on land, in response to multiple crises. Sergeant Yosief is an aircrew flight equipment technician assigned to the 18th Operations Support Squadron, Kadena Air Base, Japan. (U.S. Air Force photo/Staff Sgt. Christopher Boitz)