The expiration of the New START treaty between the US and Russia raises concerns about a new arms race and the lack of nuclear weapons control. UN Secretary General António Guterres and Pope Leo have called for negotiations to renew the treaty, emphasizing the risks of unchecked nuclear proliferation. The treaty's end marks a significant shift in arms control cooperation, with both countries modernizing their nuclear capabilities. Experts warn that the current global security landscape is increasingly dangerous, with more nations seeking nuclear deterrents. Teljes cikk (bbc.com europe)