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.

Iraqi mobile labs nothing to do with germ warfare, report finds The Observer An official British investigation into two trailers found in northern Iraq has concluded they are not mobile germ warfare labs, as was claimed by Tony Blair and President George Bush, but were for the production of hydrogen to fill artillery balloons, as the Iraqis have continued to insist. [...] Instead, a British scientist and biological weapons expert, who has examined the trailers in Iraq, told The Observer last week: 'They are not mobile germ warfare laboratories. You could not use them for making biological weapons. They do not even look like them. They are exactly what the Iraqis said they were - facilities for the production of hydrogen gas to fill balloons.' [...] The revelation that the mobile labs were to produce hydrogen for artillery balloons will also cause discomfort for the British authorities because the Iraqi army's original system was sold to it by the British company, Marconi Command & Control.

Throughout the summer and fall of 2003, the trailers became simply "mobile biological laboratories" in speeches and press statements by administration officials. In late June, Secretary of State Colin L. Powell declared that the "confidence level is increasing" that the trailers were intended for biowarfare. In September, Vice President Cheney pronounced the trailers to be "mobile biological facilities," and said they could have been used to produce anthrax or smallpox.

There is at least one report that indicates that the trailers were toilets.

The other two thought the trailers were likely biowar facilities.