Top NASA official breaks 30-year silence to reveal shock UFO footage

As alleged and on alien encounters flood the internet's stratosphere, one ex-NASA top official has revealed exclusively to the Daily Mail that the US Air Force possesses a 20-foot, gravity-defying 'flying saucer' - and claims he more than 30 years ago.

Former Chief Flight Surgeon and Air Force Major, Dr. Gregory Rogers, who on several space shuttle missions, says he was shown security footage by another Air Force major in 1992 depicting the exotic craft levitating in a hangar.

He kept the secret for more than 32 years, but following his retirement from the Department of Defense (DoD) last month, he has decided to come forward.

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