FILE - Russian President Boris Yeltsin, left, U.S. President Bill Clinton, Ukrainian President Leonid Kuchma, and British Prime Minister John Major, far right, sign the Nuclear Non-Proliferation Treaty during the Commission on Security and Cooperation in Europe (CSCE) summit in Budapest, Hungary, Monday, Dec. 5, 1994. A major United Nations meeting on the landmark nuclear Non-Proliferation Treaty is starting Monday, Aug. 1, 2022, after a long delay due to the COVID-19 pandemic, as Russia’s war in Ukraine has reanimated fears of nuclear confrontation and cranked up the urgency of trying reinforce the 50-year-old treaty. (AP Photo/Marcy Nighswander, File)