The Obama administration is hosting a nuclear security summit where global leaders will address the threat of nuclear terrorism. We’ll talk about the summit and its goals with Will Tobey, senior fellow at Harvard’s Belfer Center for Science and International Affairs. The war in Yemen has killed thousands and forced more than two million people from their homes. Now, the international aid agency Oxfam says that the ongoing conflict, “compounded by a looming banking crisis” could mean that millions of people are at risk of famine. We’ll discuss the situation in Yemen with Scott Paul, senior humanitarian policy advisor at Oxfam America. Plus, on our Global Activism segment we’ll get an update from Molly MacCready Heineman. She’s the founder Child Restoration Outreach Support Organization (CROSO), an organization helps street children in Uganda get an education.