he may have been approached by nasa to turn it down, this is from march-april 2007 interview he gave to fox news ( actually on 8 seperate occasions in the last few years he has mentioned ufos to the media but at the same time put in some other information) could have been pressured or perhaps he has decided to tone it down.
http://www.youtube.com/watch?v=GHvxaHoxJO0
