Lieberman has been calling for an attack on Iraq since 9-11 last year. Sure he's a liberal democRAT but at least he's consistent on this one issue.
A Lieberman/Gore administration would already have attacked Iraq, well before 9-11. Arabs hate Jews, Jews hate Arabs. Bush's election has only bought us time, and not much (given the hawkish stance we seem to have taken lately).
Nine-eleven could have been much worse, by a factor of ten (anthrax, bio, etc).