LOS ANGELES (AP) - An unmanned NASA jet was launched over the Pacific Ocean on Tuesday in a bid to demonstrate a radical new engine technology by flying at a world-record 7,000 mph - almost 10 times the speed of sound. The 12-foot-long X-43A "scramjet" was carried aloft under the wing of a B-52 aircraft and released over a test range off the Southern California coast. It was to fly under its own power at Mach 10 for about 10 seconds at 110,000 feet, then glide to a splash landing. The craft was designed to sink and will not be...
