A day after indicating that Russia might revoke its ratification of the Comprehensive Nuclear Test Ban Treaty (CTBT), President Vladimir Putin said on Friday (October 6) that the country would do so to be on level terms with the United States, and not to resume nuclear testing. The CTBT is a multilateral treaty that bans all nuclear explosions, whether for military or peaceful purposes. Although it was adopted by the United Nations General Assembly in 1996, it’s still in the ratification stage — 18 countries are yet to ratify (the process by which a state indicates its consent to be...