How Many Sleeper Cells Does It Take To Take Down A Great Nation?

I'm not sure we know the answer to that question and given the close to the chest way the government is handling the information it does have we may not know until the day the attack either succeeds or fails. There are a lot of folks who don't have our best interests at heart. The fact that we are not more active in seeking them out and moving them out is a symptom of the low-life that currently runs our government.