On May 29, 2003, 50 days after the fall of Baghdad, President 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.
A secret fact-finding mission to Iraq -- not made public until now -- had already concluded that the trailers had nothing to do with biological weapons. Leaders of the Pentagon-sponsored mission transmitted their unanimous findings to Washington in a field report on May 27, 2003, two days before the president's statement.
The three-page field report and a 122-page final report three weeks later were stamped "secret" and shelved. Meanwhile, for nearly a year, administration and intelligence officials continued to publicly assert that the trailers were weapons factories.
The authors of the reports were nine U.S. and British civilian experts -- scientists and engineers with extensive experience in all the technical fields involved in making bioweapons -- who were dispatched to Baghdad by the Defense Intelligence Agency for an analysis of the trailers. Their actions and findings were described to a Washington Post reporter in interviews with six government officials and weapons experts who participated in the mission or had direct knowledge of it.