Here, in the New York Times of all places, lies the answer to all of those who are using the failure to find WMDs in Iraq as a stick with which to beat the administration. The whole thing is worth reading, but here is the most essential paragraph:
"Even if you throw out all the tainted evidence, there was still what prosecutors call probable cause to believe that Saddam was harboring frightful weapons, and was bent on acquiring the most frightful weapons of all. The Clinton administration believed so. Two generations of U.N. inspectors believed so. It was not a Bush administration fabrication that Iraq had, and failed to account for, massive quantities of anthrax and VX nerve gas and other biological and chemical weapons. Saddam was under an international obligation to say where the poisons went, but did not."