I think I read a book from Tom Clancy a couple of years ago about terrorists able to buy hundreds of smoke detectors and taking the miniscule amount of the radioactive isotope out to boost fission upon an Israeli nuclear bomb, there was a movie made but I think that part was left out.
I am still saying in my posts we need to make an extreme stand, we need to do something drastic if not horrific to hold these threats upon the world at bay, myself I think a threat to destroy Mecca might get their attention.
I wonder if Mafioso got incensed enough, they'd assault Mecca. They're Catholic (or nominally so) and don't care about religious tolerance.