U.S. Navy Petty Officer 3rd Class Yusuf Martin, assigned to Fighter Squadron Composite 12, completes maintenance on the in-flight refueling probe of an F/A-18C Hornet aircraft during Exercise Northern Edge in Anchorage, Alaska, on June 14, 2011. Northern Edge is an annual joint training exercise designed to test military and civilian response and coordination capabilities while enhancing the command, control and communications relationships associated with joint operations.