(CNN) -- A half-hour video featuring the leader of al Qaeda, Ayman al-Zawahiri, was posted Tuesday on a radical Islamist website.
The video was released by As-Sahab Media, al Qaeda's media production house, as Part 1 of a series from al-Zawahiri titled, "Days with the Imam." That is a reference to his predecessor, al Qaeda founder Osama bin Laden.
In it, al-Zawahiri recalls bin Laden, who was killed in May at his residential compound in Pakistan by U.S. Navy SEALs.
CNN's Tracy Doueiry contributed to this story.