ABOARD THE USS AMERICA (LHA-6) -- The Marine Corps is working through a proof of concept for a Marine Air-Ground Task Force tailored toward fixed-wing capabilities. During the three days the Marine Corps will have 12 F-35Bs, two V-22s and one AH-1Z to use in the demonstration, Col. George "Sack" Rowell, VMX-1 commanding officer, told reporters here Nov. 19. The America is at sea for the third Joint Strike Fighter developmental test and the Marine Corps was able to tack...