"Kay said he was aware of a number of theories that the vehicles might have had other uses, "none of which make any logical sense."

Kay saw one of the vehicles on a recent trip to Iraq and received reports on the second.

Kay said most of the alternative uses that have been suggested "didn't pass the laugh test." "

The silliest one," Kay said, was the suggestion that they had been designed to generate hydrogen for meteorological balloons. "

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"This is a time for a national imperative not to fail in Iraq." Condoleeza Rice, January 11, 2007