President Obama is back in Prague, where he became the toast of Europe a year ago with a speech that envisioned a world without nuclear weapons. Today, he and Russian President Dmitry Medvedev signed a new version of the Strategic Arms Treaty, which expired last December. Supporters concede it has loopholes, but call it essential to reducing the dangers of Cold War weapons that have outlived their usefulness. Opponents say it gives too much and gets too little and allows Russia to opt out if it doesn't like US plans for missile defense in Europe. Will it make any difference to Iran or North Korea? What are the chances of ratification by Russia's parliament and the United States Senate?
A New START for Nuclear Disarmament
Steven Pifer - Brookings Institution - @steven_pifer, Ariel Cohen - Atlantic Council - @Dr_Ariel_Cohen, David Albright - Institute for Science and International Security - @ISISNuclear, Reuel Marc Gerecht - Foundation for Defense of Democracies - @followFDD, Daryl Kimball - Arms Control Association - @armscontrolnow