It's up to the United Nations, in many cases, to try to solve the worst of the world's crises. As world leaders gather in New York for the annual general assembly, crises simmer in the Middle East, Darfur and Iran. How will the U.N. handle these international problem spots?
Michele Kelemen, NPR diplomacy correspondent
Paul Kennedy, professor of international history, Yale University; author The Parliament of Man: The Past, Present and Future of the United Nations
Ray Takeyh, senior fellow for Middle Eastern studies, Council on Foreign Relations