Spiritually similar to "Zeitgeist", "Unacknowledged" is documentary that suggest that power, knowledge and most of all, secrets are in hands of small elite group that actually turns the wheels of the world. Now, nothing wrong with conspiracy theories - they can be very entertaining and perhaps contain a small grain of truth - but when faced with people who passionately insist they know the facts and gradually reveal themselves as boiling with frustration for whatever reason (because they were wronged on May 5th, 1998) it makes you wonder who actually has agenda here.
Main focus of "Unacknowledged" is constant presence of Aliens on our planets and how - for whatever reasons - US government persistently hides this, in fact (as lots of people insist here) it annually spends huge amounts of $$$ to keep it all undercover, swept under the rug and away from public eye. So far, so good - I am more willing to accept the possibility that we are not the only living species in the whole Universe than to embrace church dogma - but after a while, when all these eyewitnesses start to sound gradually more and more paranoid, people claim they were threatened and professionally discredited (erased indeed) it gets a bit too much. Even poor Marilyn Monroe ends up being victim of secret government organisation who taped her phone conversations and decided to eliminate her before she spill the beans on press conference (pillow talk was apparently about Aliens). At certain point I must have dozed off because I missed why this guy was so upset that he almost started crying - than it turns out he was interviewed once and quickly dismissed as a loony - if you think about his frustration burning all these years, think about government officials who actually used energy, time and funds to deal with people like these.
Documentary suggest that big, bad government men in black keep all secrets away from the public not because they want to prevent panic, but because they experiment with weapons and energy somewhere in desert. They don't want you to know possibilities of using free energy because big corporations want to keep you working and paying mortgage forever. Because if we know how to use free energy, we could all turn to happy vegans and grow our food in the gardens, without ever stepping a foot in supermarket. Even presidents apparently are not informed about this hush-hush operations because they are just temporary employees. Well, it was fine to watch - if nothing else, to make you start thinking - and my conclusion is that this is all a nonsense. NASA itself would welcome any informations about Alien presence because they could get more funds for research. While its true that the best strategy to deal with UFO eyewitnesses is to ridicule them (so people keep quiet rather than going public) I don't think that some big, bad secret service works against humanity somewhere deep in a basement - there is no them, just regular people who are probably exasperated with attention seekers. Most of all, US is not the whole planet Earth - even if (for whatever reasons) secret agents keep quiet about Aliens, there is a small inconvenience that we have rest of the planet where, alas, other governments would welcome a chance to start the first contact with Aliens - and to my knowledge it hasn't happened yet. I do believe we are not alone in the universe and perhaps we are being watched from a distance but maybe its better for us not to make any contact at all, as they might simply want to eat as all. As H.P.Lovecraft would say "The oldest and strongest emotion of mankind is fear, and the oldest and strongest kind of fear is fear of the unknown."