Who was Abu Bakr al-Baghdadi and what does his death mean for ISIS?

Well, obviously, he was the world's number one most wanted terrorist. The self-declared head of the Islamic State, the caliph, the head of the caliphate that at one time ruled over some 10 million people. His death is an enormous blow to ISIS as he was the spiritual leader and the strategic leader. They will find another leader. ISIS is not going away. But this is a major win for the fight against terrorism and ISIS and a major win for the Trump administration.