Uncle Sam's Giant Cracker -- Fireworks aplenty - 24 rockets, each capable of knocking a bomber from the sky - are fired from nose of newest warplane, Lockheed F-94C Starfire, now going to U.S. Air Force to bolster the aerial watch over America's ramparts. This photo shows Starfire's rocket doors open, revealing firing tubes. Black hood on nose covers radar apparatus. In actual flight, rocket doors snap open only for instant during firing. F-94C Starfire is first plane with all-rocket armament. C