I'm thinking about working for the CIA or NSA... What should I major in?

You probably will be able to get in just with the languages you speak! Of course, you would have to p an extremely invasive background investigation. Anything Law Enforcement, Legal, etc will look good. You have the language skills that are in high demand right now. Go into their websites and check it out. We need people like you to interpret all of the terrorist chat so we can go blow them off the face of this earth so they can go to their virgins.