The scary thing is, Bush knows that if he invades Iraq, Hussein will send a few SCUDS to Israel...which has already stated that if one of those falls into a populated area and causes heavy casualties, they would retaliate with a nuclear assault. And Saddam knows that all other arab nations will then attack Israel (and prolly get nuked too), then China and France and Russia will either have to intervene to make things STOP (they wont join either side anyway)... and we end up in a triangle where the US/UK are stuck in the dilemma of supporting/defending an ally that nuked Iraq in self defense, that is suddenly under attack from all flanks, PLUS have to deal with C.F.R. (China, France, Russia) AND have to somehow finish off Iraq (or whats left of) quickly.
Naaaaaaasty.
Saddam knows it. Bush knows it. Thats why both MUST have the FULL support of the UN...thats the final victory.
Sadly, that fruitcake in Baghdad holds the deciding cards.
Personally, i'd say to hell with them all and develop that neato Hydrogen fuel system. Bankrupt their economies and THEN see if they can finance a WMD development program.