Spotlight: Is a nuclear free world safe?

Officially, there are seven nuclear powers: Russia, US, China, Great Britain, France, India, and Pakistan. Why is the world afraid of the nuclear club expansion? And could those states completely disarm? The guests to answer these questions are Deputy Director of the Institute of World Economy and International Relations Vladimir Baranovsky and Steven Miller, Director of the International Security Program of the Belfer Center for Science and International Affairs at the John F. Kennedy School of Government, Harvard University.