Thanks, callmejoe, for your always elucidating comments. You're so right about the logistics for enriching uranium. It's no small matter. Hopefully, Osama is just talking through his turban here.
Here's a site that includes case studies on illicit procurement networks for nuclear weapons.
http://www.washtimes.com/upi-breaking/20041119-082558-5631r.htm
UPI NewsTrack TopNews
N.Korea suspected of supplying terrorists
SEOUL, Nov. 19 (UPI) -- The chief of U.S. forces in South Korea said Friday he is concerned that North Korea may sell its weapons-grade plutonium to international terrorists."An additional concern the international community shares is that North Korea, in its desire for hard currency, would sell weapons-grade plutonium to some terrorist organizations," Gen. Leon J. LaPorte told a forum in Seoul. "And that would be disastrous to the world."The CIA estimates that North Korea already has developed one or two atomic bombs and has enough weapons-grade plutonium to make several more. Weapons sales are a major source of revenue for the cash-strapped North, South Korean defense officials have said."Clearly, they have an opportunity to harvest plutonium from the enrichment rods," LaPorte said. "North Korea is a known proliferator of missiles, missile technology and other military hardware."The United States reportedly has designated an overseas transfer of nuclear materials by North Korea as a "red line" that could warrant the use of force.