US needs to find them. We need a "smoking gun" or else all that talk of WMD would turn out to be lies and that's not good for credibility.
And no, I doubt Saddam was stupid enough to hide the WMD where the Americans suspected them (via satellite observation). The US military has already been going to places where they were highly likely to have been hidden and not finding a thing.
So no, the US didn't blow them up. Saddam hid them well enough (at least that's what the US and Brits are hoping) or else it'd look bad if Saddam actually did destroy them when asked by the UN and this was all about modern day imperialism/colonialism.
Still, the French and Germans are now finding some wriggle room so that they can have some of that Iraqi rebuilding contracts after the war is over. Lord knows all their oil contracts have already been ripped up by now.
Sigh, the stench of money is already emanating and the war isn't even over yet ... there's already talk of IMPOSING US technology "standards" which are not being used by neighboring Arab countries so that it can be made sure that money flows back to the US. So, well-to-do Iraqi's ( we all know the average Iraqi will not have a sniff of that rebuilding money nor the oil money) will have to buy some new tV's featuring NTSC signals and cell phones with CDMA inside.