Al Qaeda's No 2 Egyptian Ayman al-Zawahri

DUBAI (Reuters) – Al Qaeda's long-serving number two, Egyptian Ayman al-Zawahri, has taken over the leadership after the killing of Osama bin Laden, the group said on Islamist websites on Thursday. Bin Laden's lieutenant and the brains behind much of al Qaeda's strategy, Zawahri vowed this month to press ahead with its campaign against the United States and its allies.By Rolly.