The New START treaty, signed in 2010, is the last remaining nuclear arms reduction agreement between the world’s top two atomic powers and limits the number of nuclear warheads each side can deploy. Russia froze its participation in New START in 2023 but has continued to voluntarily follow the limits set in the treaty. She also linked the offer to Trump’s plans to build a massive air-defence shield covering the United States, dubbed the “Golden Dome”. Anti-proliferation talks between Russia and the United States, which together control more than 80 percent of the world’s nuclear warheads, have deteriorated in recent years. Russia has also been accused of nuclear sabre-rattling since sending troops into Ukraine in February 2022.