It was really close...

Bottom line: It's relatively easy to secure land
targets from Ryder trucks,
but it's very difficult to secure them from a Cherokee
Six filled with anthrax and C-4.

Which is why it's so silly that they had people run OUT into the
streets when the Cessna approached. That's fine for the last attack
style (huge airliner hitting buildings), but a very poor idea for small
planes. In the latter case, going to the basement or inner rooms
and/or closing windows might be smarter. And less disruptive as well.

Kev