The U.S. Global Empire
http://www.lewrockwell.com/vance/vance8.html
is this what you mean by defending ourselves? or is it forcing our way of government on different cultures?
perhaps when its all said and done we can turn on the tv to watch the latest reality series, iranian idol.
and its true we are immune, when fact is fiction and tv REALITY
and today the millions cry, we eat and drink while tomorrow they die