Yet even if you include the 9/11 casualties, the number of Americans killed by international terrorists since the late 1960s (which is when the State Department began counting them) is about the same as that killed by lightning - or by accident-causing deer, or by severe allergic reactions to peanuts.
"In almost all years, the total number of people worldwide who die at the hands of international terrorists is not much more than the number who drown in bathtubs in the United States" wrote John Mueller of Ohio State University in last autumn's issue of the authoritative American journal Terrorism and Political Violence.
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Al Qaeda and individual international terrorists are the object of worldwide intelligence and police operations. They are a marginal phenomenon. The Bush administration's conflation of them with the social upheaval in their world is exploited to perpetuate changes in American society that provide a much more sinister threat to democracy than anything ever dreamed by Osama bin Laden.
The radical threat to the United States is at home.
http://www.iht.com/articles/2006/02/10/news/edpfaff.php