The United States has it's own propaganda, but it's very effective because people don't realize that it's propaganda. And it's subtle, but it's actually a much stronger propaganda machine than the Nazis had but it's funded in a different way.
Further, by acting decisively in Iraq, the United States has sent very strong signals to other nations that have been or could be terrorist sympathizers.
Inspiration is one thing and you can't control it, but hard work is what keeps the ship moving. Good luck means, work hard. Keep up the good work.