Nuclear Capabilities and Potential Around the World

The Nuclear Non-Proliferation Treaty has been signed by 189 nations since its creation in 1968. It has become the international standard by which nations are judged on their commitment to nuclear non-proliferation. But the treaty has not had a perfect record. Learn more about the pread and containment of nuclear capabilities around the world. http://www.npr.org/news/graphics/2008/feb/