Four retired Army and Air Force colonels and a former British Ministry of Defense investigator join forces this weekend at the National Atomic Testing Museum to speak on a subject public officials rarely address -- UFOs.

The Smithsonian-affiliated museum's special lecture, "Military UFOs: Secrets Revealed" is open to the public and has been long anticipated by researchers of unexplained phenomena.

The exact nature of the secrets hasn't been revealed, but the participants form a historic who's who of UFO researchers spanning half a century.

At least one of the participants has strongly hinted he's going to reveal startling UFO-related information that hasn't yet seen the light of day.

"I'm going to explain what I think and what I believe, and this is after all these years thinking about it. I think I've got the answer and no one has ever mentioned it," said retired Air Force Col. William Coleman.

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