Marines perform a weapons functional test on an F-35B Lightning II aircraft during Exercise Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, California, Dec. 10, 2015. The F-35B is a single seat, single engine stealth multi-role fighter bringing the Marine Corps into a whole new generation of aircraft. Exercise Steel Knight allowed for Marine Fighter Attack Squadron 121 and Marine Operational and Test Evaluation Squadron 22 to train on integrating the F-35B and find its place in the Marine Air Ground Task Force, while giving the ground forces of 1st Marine Division the ability to become familiar with it.
<br>Unit: Defense Media Activity - Marines
Sgt. Eric Keenan
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