MARINE CORPS AIR STATION BEAUFORT, SC -- In a joyous but awkwardly timed ceremony, the Marine Corps this week celebrated its lone F-35 training squadron's return to South Carolina -- but a fleetwide grounding that has now stretched into its second week meant no Joint Strike Fighter aircraft have yet been delivered to this base. The Marines, who along with the United Kingdom will fly the short-takeoff-vertical-landing model of the F-35, are in the process of moving all of their...