The images, with resolution good enough to distinguish a car from a truck, are better than earlier telephoto shots from the nearby mountains. The only other known image purportedly was shot by a satellite in the 1960s. It is much fuzzier. An Air Force spokeswoman would not comment Monday on any security concerns about the images. There are hundreds of buildings, living quarters, tennis courts, a baseball field, a track and a swimming pool.
Unpaved roads disappear into cliffsides, suggesting a possible underground network.
A shrouded aircraft is visible on a ramp, unusual considering the Air Force knows when Russian satellites are overhead, Hoffman said. Walter Andrus Jr., international director of the Mutual UFO Network, based in Seguin, Texas, seemed to have a hard time believing the object of so much secrecy and discussion would soon be available on the Web.