To boil it down a bit, Daniel Sheehan is offering the intelligence community who oversees maintains the secrecy of this phenomenon the opportunity to have controlled disclosure and he is threatening to bring what he has in the way of evidence to the intelligence committee if they refuse to take him up on it. This would be rather catastrophic for the gatekeepers. Within this discourse he mentions that we are being visited by non-human entities, we have recovered several of their crafts, and we have captured and possibly interrogated live aliens. He states that they are observing us and attempting to warn us that we are polluting and destroying the life sustaining potential of our world. <---Nutshell.