PHOTO: A grab taken from a video entitled "An invitation to Islam" produced by al-Qaeda-linked media group as-Sahab and released on the Internet Sept. 2, 2006 shows the number two in al-Qaeda, Ayman al-Zawahiri, at an undisclosed date and place.
PHOTO: Amedi Coulibaly poses like Ayman al-Zawahiri, dressed in white and sitting next to a VZ.58 Sporter rifle.
VIDEO: Warren Weinstein is believed to be held by al Qaeda leader Ayman Al-Zawahiri.
VIDEO: Killing of Abu Yahia Al-Libi leaves Ayman al-Zawahiri as al-Qaeda's lone leader.
PHOTO: In a new video posted online, al Qaeda leader Ayman al-Zawahiri claims that the Somalia-based terrorist group al Shabaab has joined its ranks.
PHOTO: Ayman Mohammed Rabie al-Zawahiri, the Al Qaeda Deputy, seen in a new undated video, speaks for half an hour about his fond memories with Osama bin Laden, Nov. 15, 2011.
PHOTO: Al Qaeda leader Ayman al-Zawahiri released a 13-minute video Tuesday that celebrates what he calls America's "defeats" in Iraq and Afghanistan.