RALEIGH, N.C. (AP) - Many Internet surfers ran into roadblocks Tuesday when they tried to reach a Web site displaying the first detailed satellite images to be made public of Area 51, the supersecret Air Force test site that UFO buffs think is a repository of alien technology. Was it hackers, as the company said? Or a case for "The X-Files"? The photos of the Nevada test site don't show any readily apparent signs of flying saucers or little green men among the Air Force base buildings and roadways. Raleigh-based Aerial Images Inc. - in collaboration with Kodak, Digital Equipment Corp., Autometric Inc. and the Russian agency Sovinformsputnik - posted five images of the hush-hush desert proving ground on the Web on Monday. The Air Force only recently acknowledged that Area 51 - the Groom Dry Lake Air Force Base - even exists. Beginning with the U-2 spy plane in the 1950s, the base has been the testing ground for a host of top-secret aircraft.