Even though NASA denies any cover up, Edgar Mitchell,a former Nasa astronaut, member of theApollo team-year 1971- is emphatic when he says there are extra terrestrials inhbiting our planet-and the 1947 crashings at Roswell New Mexico stand testimony to that. The people who were witness to this spectacle were forbidden by the authorities to go public with their sightings.  But not wanting to take their knowledge to their graves, they were happy to talk on this to Mitchell, he being a local boy and one who had gone as far as the moon. And so the debate on aliens continue.