re: Do you believe the CIA, FBI, etc truly have American's best interest at heart?

I wouldn't call it a conspiracy per se, but I do believe they do as they are told. If there's a universal trait to most people in these agencies it's that they're chaulk full of yes men.

When you have people who think saying no is treasonous, you end up with situations like the IRS scandals and the Clinton's. I don't think they have the best interests at heart, but that's mostly because they aren't allowed to think for themselves and take orders without question. It's the people at the top I don't trust, not the desk jockeys.