From the article you linked in post #37...
"The ISG also found a previously undeclared program to build a "high-speed rail gun," a device apparently designed for testing nuclear-weapons materials. That came in addition to 500 tons of natural uranium stockpiled at Iraq's main declared nuclear site south of Baghdad, which International Atomic Energy Agency spokesman Mark Gwozdecky acknowledged to Insight had been intended for "a clandestine nuclear-weapons program.""
The IAEA also refused to let the U.S. remove this 500 ton stockpile of Uranium last May.
LINK
From my link...
"Some 1.8 tons is classified as low-enriched uranium, a more potent form but still not sufficient for a weapon. Thomas B. Cochran, director of the nuclear program at the Natural Resources Defense Council, said the low-enriched version could be useful to a nation with nuclear ambitions.
"A country like Iran," Cochran said, "could convert that into weapons-grade material with a lot fewer centrifuges than would be required with natural uranium."