Without ICBM's, Saddam is going to have trouble getting those weapons to the US.
Right. One cargo ship registered to France (or whatever country is selling registrations, Saudi Arabia, Mexico, Columbia?) enters a NY, Washington, Miami, Atlanta, or whatever harbor and detonates their full-powered nuke (not a small suitcase nuke). Or starts spraying anthrax, or smallpox, or whatever.
Once they *get* weapons, it's almost trivial to transport it to the U.S. Maybe less trivial to go someplace inland, like Denver or Chicago, but given the porous border still not *that* hard. Not to mention that the Mississipi/Missouri/Ohio river complex gives plenty of opportunities to wreak havoc on several major cities without anyone ever setting a foot onshore.
ICBM? Who needs an ICBM for people willing to blow themselves up as suicide bombers?