Apart from September 11, I think the numbers are that in the last 30 or 40 years about 500 Americans have died from terrorism, mostly from homegrown terrorists.
除了911事件之外， 数据表明在过去的 30年或40年间 美国约有500人死于恐怖主义， 绝大多数死于本土恐怖分子手中。