Fox news is reporting the seizure of three pounds of enriched uranium, in powder form, from a sting operation in Eastern Europe. The TV claims it is enriched to weapons grade, better than 90% U-235. Critical mass for a U-235 fission bomb is supposed to be a kilogram (2.2 pounds) so three pounds is enough to make a real Hiroshima size fission bomb, rather than just a dirty bomb, at least if you know what you are doing. The Hiroshima bomb was "only" 20 Kilotons of yield, a mere firecracker compared to the yield of up-to-date nukes.
Even scarier thought. The Russians still have a lot of nukes. These are sitting in ammunition magazines scattered about Russia. Each magazine has a crew of technicians, bomb loaders, guards, and whoever. These guys are under the command of some Russian officer, a colonel at a guess. How many of those colonels are worried about layoffs, retirement savings, college educations for their children? Would one or two of them accept a million Euro's to let a couple a nukes out? A real Red Army nuke that has been tested and is highly likely to go bang? As opposed to a terrorist home made job that might well fizzle? The North Koreans demonstrated a fizzle not too long ago.