I think that this is possible, but there is still and un-answered question: why? I can't see a reason for them to hide alien existance. Can you?

Originally posted by worshipthemoonExtra-terrestrials would want to deal with the government because of something that many people claim they've experienced from alien encounters.--Almost all encounters of alien intelligence is when the human being is abducted and used as a guinea pig for experiments--they want to study human beings, because they are interested scientifically. This alludes to the same mentality of the human mind, because we also like to study and dissect and experiment with other species--this is how we gain our superior knowledge--and this is how extraterrestrial intelligence gains theirs of us. The most easiest way of aliens doing abductions of humans is with the governments cooperation, because if there was no alliance with our powerful governments, there would be strange stories abounding of 'star wars' in the skies. The Dulce base conducts experiments with the human genome, as I have read, so certain secret humans are in on it, too. If you were intersted in studying something that would add to your knowledge, would you destroy it?--This could be the mentality of the extraterrestrial mind.
but why would extraterrestrials want to deal with the government? If hostile aliens had plans of taking over our planet, they could do it on their own. And why make everyone subservient except a few people in the government? What makes them so special?
As for a shadow government--there probably are people working to keep certain things from the public, possibly even alien technology, but I doubt they have some deal with EBEs for a planned takeover.