Modus Operandi
nSuicide bombs can be delivered by multiple means, complicating security measures
uVehicle bombs:  USMC barracks in Beirut, 1983; Embassy attacks in Africa, 1998
uBoat bombs:  USS Cole, 2000
uIndividual-borne bombs: the primary method of attack in Israel since 2000
nTerrorists will choose whichever method is most likely to succeed against a particular target