In Ulster, Northern Ireland, a petty criminal kills a woman in a drunken car crash. Her sons swear revenge.In London, Sean Dillon and his colleagues in the ‘Prime Minister’s private army’, fresh from defeating a deadly al-Qaeda operation, receive a warning: ‘You may think you have weakened us, but you have only made us stronger.’In Washington, D.C., a special projects director with the CIA, frustrated at not getting permission from the President for his daring anti-terrorism plan, decides to put