Kim Jong Un has called for an "exponential" increase in North Korea's nuclear arsenal, including mass producing tactical nuclear

US Central Intelligence Agency Director William Burns was holding talks with his Russian counterpart Monday in Ankara to warn him about the consequences of using nuclear weapons, which Moscow has threatened to deploy in Ukraine.

Russia on Friday prevented the adoption of a joint declaration following a four-week UN conference on a nuclear disarmament treaty, with Moscow denouncing what it said were "political" aspects of the text.

President Muhammadu Buhari yesterday called for the total elimination of nuclear weapons, warning that trafficking in nuclear materials remains a potential threat

The Japanese city of Nagasaki on Sunday commemorated the 75th anniversary of its destruction by a US atomic bomb, with its mayor and the head of the United Nations warning against a nuclear arms race.

On July 7, the international community took a historic step when it adopted the text of the United Nations Treaty on the Prohibition of Nuclear Weapons, after a negotiating process that would not have been possible without the leadership of a group comprised of Brazil....

The CTBT makes it very difficult for countries to develop nuclear bombs for the first time, or for countries that already have them, to make more powerful bombs.