Since the other two covered the answers so well I won't bother repeating them, I will add a few comments though.

Saddam did have WMD but we are talking about 10-15 years ago. Its highly unlikely he had anything when we invaded. As for all the sources we had saying he did, did you ever actually look at it? I mean you just said the CIA got the information from the UN. You also quoted Bush, Clinton and congress as 3 sources, even though they all get their reports from the same people, the CIA. As for the other 5 countries, where did they get the report? Likely it was from either the UN or for us(With the help from the CIA). So really your dozens of sources that said he had WMD is more like 1-3 sources.