Yep, you got a point, Sue. Airliners have been hijacked or have been attempted to be hijacked SEVERAL at a time, instead of just "one," if you wanted to use that as a comparison. But if my memory serves me correct, I recall once well over 20 years ago where a college student here in the U.S. made his own 'nuclear bomb' and the feds had to confiscate it. On the news one night, gone the next. You never can tell what some "nut" might do.