And for the record, I have been to "Area 51", and the only things there are terrestrial, plain and simple. The conspiracy nuts crack me up with all the talk of "alien technology", "flying saucers", etc. When I went out there, they were testing the F-117A. There were a lot of reports at the time of black, triangle shaped UFOs, and alien craft...
People too often make up stories for that which they do not know or understand. The F-117A is a great example. Not everything the military does needs to have full disclosure.