Marines with Marine Fighter Attack Squadron (VMFA) 121 “Green Knights,” conduct a maintenance check on an F-35B Lightning II on the flight line aboard Marine Corps Air Station Yuma, Arizona, Aug. 18. The F-35 is scheduled to appear for the first time at the 2014 Miramar Air Show, Oct. 3-5. - Marines with Marine Fighter Attack Squadron (VMFA) 121 “Green Knights,” conduct a maintenance check on an F-35B Lightning II on the flight line aboard Marine Corps Air Station Yuma, Arizona, Aug. 18. The F-35 is scheduled to appear for the first time at the 2014 Miramar Air Show, Oct. 3-5.