I’m with fred@35, you cannot threaten a fanatic who believes that his insane suicidal death will gaurantee his place in heaven anymore than you can threaten a blind man with turning off the lights.

Here is a scenario that I think is a truly serious threat. Container ship with a nuclear-tipped missle on board launches a low arcing missle from just outside the Customs Authority’s inspection zone. This missle is set to explode while still ascending over the target city releasing an EMP that cripples the city and dusts it down with dirty radiation. Communications and power go down, millions exposed to radiation and workers cannot go back into the affected area to begin repairs without specialized equipment. Far worse than an earthquake of hurricane, no directly traceable fingerprints, and probably not within the design scope of the anti-missle shield.