Lt. Col. C.R. “Jimi” Clift makes the first F-35B Lightning II night landing on USS Wasp during the second at-sea F-35 developmental test event, Aug. 14. The F-35 Integrated Test Force is embarked on the Wasp for three weeks to expand the F-35B operational envelope in preparation for Marine Corps initial operational capability test in 2015. (Photo by MCSN Michael T. Forbes II, U.S. Navy) - Lt. Col. C.R. “Jimi” Clift makes the first F-35B Lightning II night landing on USS Wasp during the second at-sea F-35 developmental test event, Aug. 14. The F-35 Integrated Test Force is embarked on the Wasp for three weeks to expand the F-35B operational envelope in preparation for Marine Corps initial operational capability test in 2015. (Photo by MCSN Michael T. Forbes II, U.S. Navy)

Marine Corps Sgt. Robert Coates, an F-35B Lightning II maintainer, gives the thumbs up to Marine Capt. David Corkill piloting the joint strike fighter that he is cleared safe to resume his flying mission after hot refueling the aircraft. The F-35B and pilot were able to conduct a second training sortie after a quick ground refuel during the one-year anniversary of F-35B flying at Eglin Air Force Base, Fla. Eglin is the heart of F-35 training worldwide for the Air Force, Marines, Navy and international partner operators and maintainers of the Lightning II. - Marine Corps Sgt. Robert Coates, an F-35B Lightning II maintainer, gives the thumbs up to Marine Capt. David Corkill piloting the joint strike fighter that he is cleared safe to resume his flying mission after hot refueling the aircraft. The F-35B and pilot were able to conduct a second training sortie after a quick ground refuel during the one-year anniversary of F-35B flying at Eglin Air Force Base, Fla. Eglin is the heart of F-35 training worldwide for the Air Force, Marines, Navy and international partner operators and maintainers of the Lightning II.

Marine Fighter Attack Squadron 121 F-35B Lightning II Joint Strike Fighter prepares to make a vertical landing aboard Marine Corps Air Station Yuma, Ariz., March 21, 2013. This marks the first vertical landing of a Marine Corps F-35B outside of a testing environment. - Marine Fighter Attack Squadron 121 F-35B Lightning II Joint Strike Fighter prepares to make a vertical landing aboard Marine Corps Air Station Yuma, Ariz., March 21, 2013. This marks the first vertical landing of a Marine Corps F-35B outside of a testing environment.

Lockheed Martin test pilot Dan Canin flies BF-2 during air start testing Aug. 8. Air starts test the ability of the F-35?s propulsion system to restart during flight. Verifying the restart capability of the propulsion system is part of the initial flight test program for the F-35 and a prerequisite for high angle-of-attack testing. The F-35B is the variant of the Joint Strike Fighter designed for use by U.S. Marine Corps, as well as F-35 international partners in the United Kingdom and Italy. The F-35B is capable of short take-offs and vertical landings to provide air power from amphibious ships, ski jump aircraft carriers and expeditionary airfields. The F-35B is undergoing test and evaluation at NAS Patuxent River prior to delivery to the fleet. - Lockheed Martin test pilot Dan Canin flies BF-2 during air start testing Aug. 8. Air starts test the ability of the F-35?s propulsion system to restart during flight. Verifying the restart capability of the propulsion system is part of the initial flight test program for the F-35 and a prerequisite for high angle-of-attack testing. The F-35B is the variant of the Joint Strike Fighter designed for use by U.S. Marine Corps, as well as F-35 international partners in the United Kingdom and Italy. The F-35B is capable of short take-offs and vertical landings to provide air power from amphibious ships, ski jump aircraft carriers and expeditionary airfields. The F-35B is undergoing test and evaluation at NAS Patuxent River prior to delivery to the fleet.