Al Qaeda leader Ayman al-Zawahiri has been killed in a CIA drone strike in Afghanistan on Saturday. US President Joe Biden said that 'justice has been delivered' after the US drone strike in Afghanistan this weekend killed Ayman al-Zawahri, who helped Osama bin Laden plot the September 11, 2001, attacks on the United States and ensured Al-Qaida survived and spread in the years after. Zawahiri was killed in his residence. The area where Zawahiri's residence is located is a posh area of Kabul. Watch this video.