Crewmen from the 14th Tactical Fighter Squadron, Misawa, Japan, AIRMAN 1ST Class Andrew Ecker, back, STAFF SGT. Drew, middle, and AIRMAN 1 Class Tyron Flynn load a Mark 84 bomb under the wing of an F-16 Fighting Falcon aircraft during Cope Thunder North. The exercise tests aircrews' skills in strike, support, air defense and combat rescue roles. Units from the Canadian Forces, the U.S. Marine Corps, Alaska Air National Guard, Strategic Air Command and other Pacific Air Forces units are participating.