EGLIN AIR FORCE BASE, Fla. -- Marine Corps Maj. Aric Liberman, operations officer, Marine Fighter Attack Squadron 501 at the 33rd Fighter Wing, Eglin AFB, Fla., trains with Lockheed Martin contracted logistics maintenance personnel during the first engine run of the F-35B, March 14. The F-35B is the Marine Corps variant of the Joint Strike Fighter. (U.S. Air Force photo/Maj. Karen Roganov)