Hehe, its sort of a weird situation we got goin' on here. We're the second largest country in the world land-wise (Russia is first), yet we only have 30 million people livin' here...
Add to that our extremely small military of about 10,000 men, and you'll know why other countries don't bother attacking us.
A) The Chances of hitting anything, muchless finding anything, is pretty slim if you stray from the border...
B) The US needs us for our natural resources, so they'll look after us.
Hehe, we live pretty free lives over here, that's for sure.