What government conspiracy theories do you believe to be true?

I have just been researching some of the theories, like area 51, 9/11, federal reserve, planet x. I am still debating on what i believe and don’t believe, trying to differentiate what is fact and what is fiction. What conspiracy do you believe and why and what is your political affiliation?

The Federal Reserve is messed up. I don’t have to believe in any "conspiracy theory" for that. Our money system is a system of self generating inextinguishable debt. This is a fact not fiction or a theory.

I "believe" there is a link between it and The Kennedy assassination. He was about to abolish it via executive order before they wasted him.