The Scariest Threats to the United States

Lots of stuff to be scared of these days… more than usual, even in our normal fear-based-economy. The media and the pundits and the politicians love to find new things for you to be afraid of every time they want your attention or your votes or your money… but what do you think the REAL threats to America are? Vote up your biggest fears and re-rank the list in the order of most important to least important and make sure to ADD any scary stuff I missed.