An Air Force F-35 Lightning II pilot prepares to refuel Dec. 12, 2013, at Eglin Air Force Base, Fla. The F-35 is a fifth-generation fighter, combining advanced stealth with fighter speed and agility, fully fused sensor information, network-enabled operations and advanced sustainment. (U.S. Air Force photo by Senior Airman Christopher Callaway)
                
                    
                        PHOTO BY:
                        SrA Christopher Callaway
                    
                    
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                        131212-F-TJ158-508.JPG
                    
                    
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