Summary: <p>The leaders of more than a dozen countries attended a meeting in Tehran, Iran, aimed at ending the violence in Syria. Egyptian President Mohammed Morsi fired his intelligence chief and other top security officials on Wednesday in response to the killings of 16 soldiers in the Sinai Peninsula. And the murder trial of Bo Xilai's wife, Gu Kailai, concluded in China behind closed doors. Courtney Kube of NBC News, Tom Gjelten of NPR and Nadia Bilbassy of MBC TV join Diane for analysis of the week's top international news stories.</p>
