Ian Paisley's declaration since that his party "will not be found wanting" if republicans, in his words, "complete the transition to democracy and the rule of law", has been welcomed by pro-agreement politicians but it has rocked sections of his party and his traditional supporters.

BBC: Profile: Ian Paisley

In other words, for the war in Iraq, the data indicate a transition from an index characteristic of more lethal, conventional war between armies to one closer to terrorism.

ECONOMIST: Modelling conflict