This is pure speculation. Unfortunately, it's possible, because there are rogue nations who might be willing to sell atomic weapons and the Arabs have billions in cash. Although Bush scared Libya into dropping its atomic program (for which the leftist media have given Bush zero credit, barely mentioning this huge story), there are weapons to be had from China, Pakistan, and North Korea. And Pakistani nuclear scientists are still out there somewhere.
The Russian suitcase weapons have been a perennial rumor, but nothing seems to have come of it. If they have had them for years, as the story goes, I should think they would have used them before now.
It would be nice if the FBI and the CIA could get their acts together and start putting a few more agents in place. Their human intelligence vis-a-vis the Muslims is not very good.
Nine crack sniper teams in nine different cities would create absolute chaos....