Europe pays us to be there because Russia'sgovernment still can't be fully trusted with nukes. We're concentrated in South Korea because of North Korean nukes. President Barack Obama is calling for new forces in Southeast Asia to counter China's unpredictability. And if Saddam Hussein had allowed inspectors full access to Iraq, we never would have gone in there. We (incorrectly) assumed he was hiding nukes from us, when he was actually hiding the fact that he did not have any from Iran. Who knew? Lastly, we're ultimately still in Afghanistan as an indirect means of keepingPakistan's nukes out of the hands of extremists.