Once again, the road to terror runs through Pakistan. Despite Islamabad's claims to have played a crucial role helping Britain uncover a plan to blow up airliners flying to the United States, Pakistan remains a breeding ground for terror and is the most likely hiding place for Osama bin Laden. Terror groups operating out of Pakistan may already have taken over al-Qaeda's functions in a global terror network. Operating virtually unmolested under dozens of different identities, they are recruiting, radicalizing and training young militants for future attacks on Western targets. As details of a plot to blow up as many...