For those who want their weapons-of-mass-destruction-related-program-activity-related quotes in one disclosed location, Misleader.org, a service of Moveon.org, tracks the evolution of White House WMD rhetoric. Here's a small sample, plus a bonus Cheney quote from NPR today.
Then: "No doubt the Iraqi regime continues to possess the most lethal weapons ever devised." (Bush, March 2003)
Now: "We're seeking all the facts. Already, the Kay Report identified dozens of weapons of mass destruction-related program activities and significant amounts of equipment that Iraq concealed from the United Nations. Had we failed to act, the dictatator's weapons of mass destruction programs would continue to this day." (Bush, January 2004)
Then: "There is no doubt that Saddam Hussein now has weapons of mass destruction...to use against our friends, against our allies, and against us." (Cheney, August 2002)
Now: "I think the jury is still out...It's going to take some additional considerable period of time in order to look in all of the cubby holes and ammo dumps in Iraq where you might expect to find something like that." (Cheney, January 2004)