I saw an interview with Gary McKinnon on BBC news awhile back, in the interview he didn't give away to much about what he found. Gary McKinnon allegedly hacked into Nasa computers and found images and info of a very top secret nature. I remember watching the interview and thinking "come on just say it", well he has, in a new interview over at Wired News. In the interview Gary McKinnon describes a photo he saw of what could be a UFO, he also mentions government suppressed alien technologies, reverse engineering of UFOs and alternative energies, he also describes some of his reasons for doing this.
It's a very interesting read.
Gary Mckinnon interview @ Wired News