Maybe he's not permitted to disclose his own personal encounters with our visitors. Or maybe he's seen some classified documents and photographs that convinced him, without a doubt, that 'they' are here, but, once again, he's not permitted to talk about that to the public... or anyone for that matter. It's hard to believe that his obsession with UFOs and ET's is based solely on his grandparents UFO sighting that happened sometime in his childhood.