550 Metric Tons of Yellowcake, what about it? (see video)
"While yellowcake alone is not considered potent enough for a so-called "dirty bomb" — a conventional explosive that disperses radioactive material — it could stir widespread panic if incorporated in a blast. Yellowcake also can be enriched for use in reactors and, at higher levels, nuclear weapons using sophisticated equipment."
"U.N. inspectors documented and safeguarded the yellowcake, which had been stored in aging drums and containers since before the 1991 Gulf War. There was no evidence of any yellowcake dating from after 1991, the official said." - AP Exclusive: US removes uranium from Iraq By BRIAN MURPHY Associated Press Writer