President Barack Obama said Tuesday he has charged Secretary of State John Kerry to work with European allies, Russia and China in pursuit of a nuclear weapons agreement with Iran. Obama added in his U.N. General Assembly address that he is encouraged by Iranian President Hasan Rouhani's pursuit of a "more moderate course," but his words will need to be proven by "actions that are transparent and verifiable." Rouhani is set to speak before the U.N. later Tuesday. On Syria, Obama said the Security Council must agree to a resolution that includes consequences for President Bashar Assad if he doesn't comply with the agreement to hand over his chemical weapons stockpile. Obama used the mall attack in Kenya as a recent example of the dangers that remain in the region.