In Syria, rebel leaders kill top military officials in Damascus, a brazen attack against the Assad regime. There is growing concern over the country’s chemical weapons stockpiles. A suicide bomber kills five Israeli tourists on a bus in a Bulgarian resort town. Officials have identified the bomber as a member of the Iran backed Hezbollah. Secretary of state Hillary Clinton visits Israel to address the Iranian nuclear threat and Egypt’s struggle to transition to democracy. And British government officials grapple with a major security shortfall days before the Olympics begin in London. Diane and guests discuss this week’s international news.