Terry Gross

Col. Lawrence Wilkerson was chief of staff for former Secretary of State Colin Powell; he became an outspoken critic of the Bush administration after leaving the State Department in January 2005.

Lawrence Wright is an author, screenwriter, playwright and a staff writer for The New Yorker magazine. He sits on the Council on Foreign Relations, and he won a Pulitzer Prize for his book The Looming Tower: Al-Qaeda and the Road to 9/11.

A former U.S. ambassador to Croatia and a senior diplomatic fellow at the Center for Arms Control and Non-Proliferation, Peter Galbraith is author of The End of Iraq: How American Incompetence Created A War Without End.