Intelligence Squared US

is Israel's ambassador to the United States. Since 2002, he has worked extensively with the US administration and Congress in advancing economic, political and diplomatic relations. He has served the last three consecutive Israeli administrations, most recently as Chief Foreign Policy Adviser to Prime Minister Ariel Sharon. In the 1990s, he was posted in New York and Panama.

is the Douglas Dillon Fellow at the Council on Foreign Relations. An expert on Arab politics and US Middle East policy, Cook directed the Council's Independent Task Force on reform in the Arab World. He has written widely on Islamist politics and democratic development in the Middle East.

is a senior fellow at the Hudson Institute. He is a political journalist who has edited publications from The National Review to the London Times. He is currently writing a book on Reagan, Thatcher and the Pope. O'Sullivan began his career as a London correspondent for Irish Radio & Television.

is an American lawyer who is probably best known for his defense of Mousa Abu Marzook the head of the political wing of Hamas, whose extradition from the United States was sought by Israel in 1995. Over the years he has represented many other Muslim and Palestinian activists and imams throughout the United States and overseas.

is Associate Director of the Harvard Program on Humanitarian Policy and Conflict Research. Previously, he served as Director of Research at the International Council on Human Rights in Geneva, where he helped found and direct the research and policy program. He is the author of several books and essays on human rights, civil society and conflict.

is a former journalist, current author and co-director of the UK/DC-based Conflicts Forum. Through Conflicts Forum, Perry has been engaged in a series of exchanges with Hamas over the past two years. He has worked with Arafat's Fatah wing and Hamas to cool their political competition. He is author of A Fire in Zion: The Israeli-Palestinian Search for Peace (1994).