by Kenneth Allums
On May 29, 2003, 50 days after the fall of Baghdad, Mr. Bush proclaimed a fresh victory for his administration in Iraq: Two small trailers captured by U.S. and Kurdish troops had turned out to be long-sought mobile "biological laboratories." He declared, "We have found the weapons of mass destruction."
The claim, repeated by top administration officials for months afterward, was hailed at the time as a vindication of the decision to go to war. But even as Bush spoke, U.S. intelligence officials possessed powerful evidence that it was not true. See this article in the Washington Post