3/20/2012 - Maj. Aric Liberman, the operations officer for the Marine Fighter Attack Squadron 501, and Lockheed Martin personnel train during the first engine run of the F-35B Lightning II joint strike fighter at Eglin Air Force Base, Fla., March 14. The run determines the joint strike fighter's health and is the first step in moving toward F-35B flights here. (U.S. Air Force photo/Maj. Karen Roganov)