There is and was a lot of non-weapons-grade nuclear material around the ex-USSR, there were even little nuclear "generators" that made heat out in the woods to power equipment. I think most of it was not usable to build a nuke, but merely nasty, toxic stuff that could be used to build a dirty bomb.
Didn't catch details about whatever nuclear material they'd found, though. 'Dirty bombs' that fit in a suitcase...enough to scare you to death. This new policy of letting people take small scissors and knives on planes didn't make sense, you had to know something was missing. Like logic. Then, the other day they finally said airport screeners needed more time to look for IED's. That's reassuring. Not.