Terry Gross

Middle East policy expert Daniel Byman talks about the effect of the war in Iraq on state-sponsored terrorism.

Byman is the director at the Center for Peace and Security Studies at the Edmund A. Walsh School of Foreign Service at Georgetown University, where he is also a professor.

Journalist George Packer's article in the March 26 issue of The New Yorker magazine is called "Betrayed: The Iraqis Who Trusted America the Most."

He reports that men employed by Americans as interpreters, construction workers, drivers and office workers are now being marked for death and hunted down as collaborators.

Packers most recent book is The Assassins Gate: America in Iraq.

Weapons expert Joseph Cirincione's new book is Bomb Scare: the History and Future of Nuclear Weapons. He talks about how nuclear threats will evolve in coming years.

Cirincione is senior vice president for national security and international affairs at the Center for American Progress. He also teaches at the Georgetown University School of Foreign Service. And he is a member of the Council on Foreign Relations.