Almaty Hosts Iranian Nuclear Talks

World powers and Iran are holding a fresh round of talks on Tehran's controversial nuclear program in Kazakhstan. European Union foreign policy chief Catherine Ashton,  who is representing the so-called P5+1 -- the United States, Russia, China, France, Britain and Germany --  expressed "cautious optimism" ahead of the two-day meeting in Almaty, which started on April 5. (AP video)