Three and a half years ago, in a speech that crystallized a post-Sept. 11 turnaround, President Pervez Musharraf vowed to eradicate extremism in his country. “We will take strict action against any Pakistani who is involved in terrorism inside the country or abroad,” he said. That was Pakistan, Jan. 12, 2002. This week, evidence that three of the four London bombing suspects had visited Pakistan for up to three months last year has thrown new light on old facts. Pakistani officials have answered the London attacks with an investigation into any potential links here and calls for a fresh crackdown on militant groups. But the question arises whether the new steps will be any more effective in snuffing out extremism than efforts past. Full Story