The continued cooperation of Najibullah Zazi with the investigation into his attempt to carry out terrorist attacks in New York City has led to the arrest of a fourth suspect, a Pakistani citizen, two days ago, and has shed some new light on the details of the case and the specific targets Zazi and his co-conspirators intended to hit. Few developments in the case have come out of Pakistan, where the fourth suspect, who has not been named, was arrested. Authorities say he will be extradited to the United States soon, but that "he may not ultimately be charged in...