The Pentagon recently purchased retrofit modification kits for the Marine Corps F-35 variant that are critical to the service declaring its jets operational in July 2015, according to a program spokesman. On Oct. 22, the Defense Department awarded a $110 million delivery order to Lockheed Martin for 281 retrofit modification kits. These kits will be installed on all three variants of Joint Strike Fighter aircraft, Joe DellaVedova, F-35 communications director wrote, in an Oct. 28 email to Inside the Navy...