Â鶹Éç

Available for over a year

President Biden says justice has been delivered with the killing of the al Qaeda leader Ayman al-Zawahiri, in a US drone strike in Afghanistan. Mr Biden said the death of Zawahiri -- who helped mastermind the September the eleventh attacks -- would bring closure to the families of victims. Colin Clarke is the Director of Policy and Research at The Soufan Group, where his research focuses on domestic and transnational terrorism, international security, and geopolitics. So if Osama Bin Laden was largely perceived as the charismatic leader of al-Qaeda, was al-Zawahiri the brains? (Photo: Ayman al-Zawahiri. Credit: Getty Images)