Irene Klotz of the Discovery Space website interviewed Edgar Mitchell about his claims that intelligent space creatures have landed on Earth and that the US government has been covering it up.
EM: My major knowledge comes from what I call the old-timers, people who were at Roswell and subsequent who wanted to clear the things up and tell somebody credible even though they were under severe threats and things — this was back in the Roswell days. Having gone to the moon and being a local citizen out in the Roswell area some of them thought I would be a safe choice to tell their story to, which they did. Even though the government put real clamps on everybody, it got out anyhow.
Subsequent to that, I did take my story to the Pentagon — not NASA, but the Pentagon — and asked for a meeting with the Intelligence Committee of the Joint Chiefs of Staff and got it. And told them my story and what I know and eventually had that confirmed by the admiral that I spoke with, that indeed what I was saying was true.
IK: You mean what had been told to you was true?
EM: Yup, in other words. There was a UFO crash. There was an alien spacecraft. This gentleman tried his damndest to get me in and like so many others in the administration over the last 60 years, since JFK's time, was unable to. He was told 'Admiral, you don't have a need to know, and therefore go get lost,' essentially.
Apollo Astronaut Chats About UFO, Alien Belief (Discovery Space. Thanks, Chris!)