The latest research into the link between germs and mental illness -- and what we all need to know.
Iran’s president prepares a set of proposals he says will end the international stand-off over its nuclear program. The Obama administration considers dropping a long-standing pre-condition for negotiations. The latest on U-S Iran relations.
- David Sanger chief Washington correspondent for "The New York Times," author of "The Inheritance: The World Obama Confronts and the Challenges to American Power."
- John Tirman Executive Director and Principle Research Scientist at the Center for International Studies. He is author or coauthor of ten books on international affairs.
- Patrick Clawson deputy director of the Washington Institute for Near East Policy and co-author of "Eternal Iran."
- David Albright former U.N. nuclear weapons inspector and president of the Institute for Science and International Security
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