An F-35B Lightning II flies during a training mission on Eglin Air Force Base, Fla., Dec. 12, 2013. The single-engine F-35 will be manufactured in three versions. The F35B, which is a short-landing and vertical takeoff variant, will be used by the U.S. Navy. (U.S. Air Force photo/Senior Airman Christopher Callaway)
Airman 1st Class Christopher Callaway
Taken on 12 December 2013
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