• Email Bluesky Facebook LinkedIn Reddit Whatsapp X You have full access to this article via your institution. • The US army regularly performs simulations for dealing with various weapons of mass destruction. • This exercise took place in Morocco last May.Credit: Abdel Majid Bziouat/AFP/Getty Earlier this month, the New START treaty, a strategic-arms reduction agreement between Russia and the United States to limit their nuclear arsenal, expired. • That accord was the last in a series of such agreements that have been extended or renegotiated since the end of the cold war. • This time, however, neither country has shown a willingness to extend, let alone replace, it. • The world stands at a perilous moment in its efforts to control the spread of nuclear weapons,warns physicist Karen Hallberg, who leads the Pugwash Conferences on Science and World Affairs.

Article Summaries:

  • Earlier this month, the New START treaty, a strategic-arms reduction agreement between Russia and the United States to limit their nuclear arsenal, expired. That accord was the last in a series of such agreements that have been extended or renegotiated since the end of the cold war. This time, however, neither country has shown a willingness to extend, let alone replace, it. The world stands at a perilous moment in its efforts to control the spread of nuclear weapons, warns physicist Karen Hallberg, who leads the Pugwash Conferences on Science and World Affairs. Scientists can help stop a slid

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