Dual-Use Technology
Trucks and trailers in Iraq apparently served two purposes: Whatever the Iraqis were actually using them for, and a casus belli for Bush:

"It was a foregone conclusion that every photo of a trailer truck would be a `mobile bioweapons lab' and every tanker truck would be `filled with weaponized anthrax,' " a former military intelligence officer said. "None of the analysts in military uniform had the option to debate the vice president, secretary of defense and the secretary of state." -- from Nicholas Kristof's Op-Ed today.