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So put aside Mr. Wilson's February 2002 trip to Africa. The plot that matters starts a month later, in March, and its omniscient author is Dick Cheney. It was Mr. Cheney (on CNN) who planted the idea that Saddam was "actively pursuing nuclear weapons at this time." The vice president went on to repeat this charge in May on "Meet the Press," in three speeches in August and on "Meet the Press" yet again in September. Along the way the frightening word "uranium" was thrown into the mix.
By September the president was bandying about the u-word too at the United Nations and elsewhere, speaking of how Saddam needed only a softball-size helping of uranium to wreak Armageddon on America. But hardly had Mr. Bush done so than, offstage, out of view of us civilian spectators, the whole premise of this propaganda campaign was being challenged by forces with more official weight than Joseph Wilson. In October, the National Intelligence Estimate, distributed to Congress as it deliberated authorizing war, included the State Department's caveat that "claims of Iraqi pursuit of natural uranium in Africa," made public in a British dossier, were "highly dubious." A C.I.A. assessment, sent to the White House that month, determined that "the evidence is weak" and "the Africa story is overblown."
AS if this weren't enough, a State Department intelligence analyst questioned the legitimacy of some mysterious documents that had surfaced in Italy that fall and were supposed proof of the Iraq-Niger uranium transaction. In fact, they were blatant forgeries. When Mohamed ElBaradei, the director general of the International Atomic Energy Agency, said as much publicly in the days just before "shock and awe," his announcement made none of the three evening newscasts. The administration's apocalyptic uranium rhetoric, sprinkled with mushroom clouds, had been hammered incessantly for more than five months by then - not merely in the State of the Union address - and could not be dislodged. As scenarios go, this one was about as subtle as "Independence Day" and just as unstoppable a crowd-pleaser.
http://nytimes.com/2005/07/17/opinion/17rich.html?pagewanted=2&hp