government agencies?

I'm working on a movie script, and I need some information. Someone want to explain how the government works for me?

Okay, how about just where I can learn about some structuring, who handles what? Currently, the director of a rather special school is being handled by an agency, perhaps shadowy, which funds him to train young telepaths for gov't use. A situation comes up where it seems he might be directing the kids to cause chaos, or where the chaos might be home-grown terrorism and the kids might be of use in stopping it.

What agency might be funding him to begin with? What agency(s) would be involved if there's the possibility of domestic terrorism? Would the case be "handed off" to the new agency, or would they collaborate?