Having wrapped up flight-testing this weekend of the Navy version of their Joint Strike Fighter candidate aircraft, Lockheed Martin program officials are now turning their attention to the short takeoff and vertical landing aircraft the Marine Corps will use. Lockheed program officials told reporters today they expect flight tests of the Marine Corps variant, dubbed X-35B, to start in mid June. Tom Burbage, executive vice president and general manager of Lockheed Martin's JSF program, said clearance for flight tests of...