A U.S. Marine Corps F-35B Lightning II flies through

A U.S. Marine Corps F-35B Lightning II flies through the skies above Joint Base Elmendorf-Richardson, Alaska, May 3, 2017. Northern Edge is Alaska’s largest and premier joint training exercise designed to practice operations, techniques and procedures, as well as enhance interoperability among the services. The exercise provides real-world proficiency in detection and tracking of units at sea, in the air and on land and response to multiple crises in the Indo-Asia-Pacific region. The F-35B is based out of Marine Corps Air Station Iwakuni, Japan with Marine Fighter Attack Squadron 121, Marine Aircraft Group 12, 1st Marine Aircraft Wing, III Marine Expeditionary Force. (U.S. Marine Corps photo by Lance Cpl. Andy Martinez)