WorldZawahiri urges Muslim to retaliate Osama’s deathSaeed AbbasiAugust 15, 2011September 26, 2011 by Saeed AbbasiAugust 15, 2011September 26, 2011 London: Al-Qaeda’s new leader Ayman al-Zawahiri called on Muslims to target the United States and avenge the killing of former al Qaeda leader Osama bin...