New START expiry sparks fears of a renewed US-Russia arms race

TL;DR
With the expiry of the New START treaty, experts worry about a renewed US-Russia arms race as both powers modernize arsenals and long-standing arms-control structures fray; global leaders, including Pope Francis, have urged renewal, while talks about broader deals—potentially involving China and other nuclear powers—remain unsettled.
- Fears of new arms race as US-Russia nuclear weapons treaty due to expire BBC
- New arms race looms as clock ticks down on last Russia-US nuclear treaty Reuters
- Arms control treaty limiting U.S., Russian nuclear weapons to expire, as leaders mull what's next cbsnews.com
- Trump prepares to let go of arms control with Russia Politico
- Death of New START heralds "a world with more nuclear risk" Axios
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