I've been reading about the US Secret Space Program for a while now and this video gives you a taste of what it's all about. It is quite alarmist but when it's talking about the Nazis remember that NASA was founded on captured World War 2 Nazi technology along with captured Nazi scientists. I'm not sure if I can believe in an 'off world' Nazi colony though.
Tim Good talks about 50 different alien species, an Earth v. Alien conflict and Neil Armstrong admitting there were alien craft on the moon.
I wonder what these people will say if life as we know it doesn't end on 21st December 2012.