[SEJeff]

As a former US Army soldier / veteran I would hesitate on calling us the largest military in the world. China's military positively dwarfs ours and believe it or not, North Korea has the most special forces of any military last I checked. That being said because we spend more yearly on defense than most countries have as gdp, we undoubtedly have one of the most effective militaries. I'd lump the NSA under the military term since they fall under the DoD and ultimately the Pentagon here.