Edmund Fitton-Brown — outgoing coordinator of the UN Security Council Analytical Support and Sanctions Monitoring team and longtime friend of the show — joins Bill to discuss the killing of Al Qaeda emir Ayman Zawahiri, who died in a U.S. drone strike last Sunday.

That the leader of Al Qaeda was killed in Kabul "comprehensively disproves" Taliban claims that Al Qaeda has no presence inside of Afghanistan. On the contrary, it proves that the group's top leadership uses the country as a safe haven.

They talk about what's next for Al Qaeda in Afghanistan and for its affiliates around the world as well as Zawahiri's possible successor.