WASHINGTON, April 20, 1943 (UP) - The aircraft carrier Hornet was the "Shangri-La" from which 16 American bombers under Maj. Gen. James H. (Jimmy) Doolittle bombed Japan a year ago and all but one of the planes was wrecked on or off the China Coast after carrying out their mission "with complete success," the first official story of the memorable raid revealed Tuesday night.