NEW YORK - Sixty-five years after an American P-38 fighter plane ran out of gas and crash-landed on a beach in Wales, the long-forgotten World War II relic has emerged from the surf and sand where it lay buried. Beach strollers, sunbathers and swimmers often frolicked within a few yards of the aircraft, unaware of its existence until last summer, when unusual weather caused the sand to shift and erode. The revelation of the Lockheed "Lightning" fighter, with its distinctive twin-boom design, has stirred interest in British aviation circles and among officials of the country's aircraft museums, ready to reclaim...