Melbourne, July 26 : Moonwalk astronaut Dr Edgar Mitchell caused a worldwide stir by claiming that aliens exist. Now, he has made yet another sensational statement saying that there was a cover-up over the infamous Roswell alien incident of the 1940s.

The ex-NASA astronaut found himself in the news regarding remarks he made on the British radio program Kerrang! about believing in aliens, and the long-rumored UFO crash in Roswell, New Mexico.

Dr Mitchell claims his information on Roswell comes from "old timers".