The United Nations rebukes Iran for failing to make its nuclear program transparent, but the United States and Russia maintain thousands of nuclear warheads. Some activists say those stockpiles should cause more concern than the efforts of Iran and other countries. Join NPR's Neal Conan and his guests for an update on the global nuclear threat.
*NPR diplomatic correspondent
*Vice president of studies at the Carnegie Endowment for International Peace
Dr. Helen Caldicott
*President of the Nuclear Policy Research Institute
*Vice president of the Lexington Institute, a public policy group
*Director of the Office of Strategic Competitiveness in the Defense Department in the first Bush administration