Russian President Vladimir Putin promulgated a law this Thursday that revokes the ratification of the Comprehensive Nuclear Test Ban Treaty (CTBT), against the backdrop of the conflict in Ukraine and the crisis with the West. The 1996 treaty bans all nuclear weapons tests, although it never came into force because some key countries - including the United States and China - never ratified it. Putin put his signature on the text, which had already been endorsed by Parliament, where the ruling party is the majority, reported the AFP news agency. The president said in early October that his country could revoke its ratification of the CTBT in response to the fact that the United States never ratified it. "I'm not ready to say whether or not we should resume testing," he added, while praising the development of new missiles that can carry nuclear warheads. Since the start of the conflict in Ukraine in February 2022, senior Russian officials have threatened to use nuclear weapons on several occasions, although on other occasions Putin has shown caution in this regard. Last week, the Russian president supervised maneuvers with ballistic missiles to prepare his troops for a "massive nuclear attack" of retaliation