a statistic for you...

... 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.

from "A 'long war' designed to perpetuate itself" in The International Herald Tribune