Last year on the day after US forces killed Osama bin Laden, the group he founded was seen by some as on its last legs. No more. While under siege by drones in Pakistan and increasingly in Yemen, Al Qaeda not only received a new lease of life from the Arab Awakening, but has created its largest safe havens and operational bases in more than a decade across the Arab world. It's not a popular movement, but its ideology, organization and lethal power promise to be a long-term challenge to the world.
