Possibly, espcially as whenever Pres Bush refers to the threat of "terrorism" it sounds like "tourism"! Many Americans - especially those in the mid-West without passpoprts - probably think terrorism and tourism are the same thing.
Terrorism is bull... Everyone is such a pussy for going "ooo ooo we're going to get bombed ooo ooo"... you're more likely to win the lottery, die in a car crash, make love to a celebrity AND meet Jeremy Beadle in MacDonalds (Oh... That actually happened to me! Forget that then!). The effects of terrorism on tourism are minimal in our country, simply because we haven't actually had a terrorist attack yet!