We talk with Balkan expert Daniel Serwer about Serbia’s future, the elusive General Ratko Mladic and the role of E.U. and U.S. foreign policy in the region. Also, Worldview’s Global Cities contributor Barry Weisberg stops by to discuss the success and failures of the Shanghai World Expo that ended last week. And in our Global Activism segment, we hear about three friends who started an organization that works with children affected by Zambia’s HIV/AIDS epidemic.