UN Chief urges nations to ratify nuke treaty
United Nations Secretary General Ban Ki-moon on Wednesday urged nuclear-armed states, including US and China, to ratify the Comprehensive Nuclear-Test-Ban Treaty. The treaty, which has been ratified by 164 nations, was opened for signature in 1996. India too has not ratified the treaty, which seeks to ban all nuclear explosions. Pakistan, North Korea, Israel are also yet to ratify it. 