Just how big is our defense budget?

From the perspective of the entire Federal budget we only spend something like 25% on defense. But when compared with the amount of money other countries spend our defense spending looks ridiculous!

http://www.blogger.com/post-create.g?blogID=8013232043570162388

Just think of what we could be doing with all the money. We could cut our defense budget by $450 BILLION and still be spending more than TWICE as much as China. Crazy. As % of GDP we're on par with the most volatile region on Earth - the Middle East.