The five permanent members of the U.N. Security Council reach an agreement on Syrian chemical weapons. An al-Qaida affiliate in Syria gains the support of key rebel groups. Iran’s president makes his international debut at the U.N. President Barack Obama defends American engagement in the Middle East and says the U.S. is rethinking its surveillance activities. And Kenya mourns victims of the attack at a Nairobi shopping mall while investigators collect evidence at the site of the deadly siege. A panel of journalists joins guest host Susan Page for analysis of the week’s top international news stories.