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In this official file photo of Northern Edge 2015, a U.S. Navy F/A-18F Super Hornet from the Air Test Squadron, China Lake, Calif., taxis to take off during Exercise Northern Edge at Joint Base Elmendorf-Richardson, June 18, 2015. Northern Edge 15 is Alaska’s premier joint training exercise designed to practice operations, techniques and procedures as well as enhance interoperability among the services. Thousands of participants from all services, from active duty, Reserve and National Guard units, are involved.