Treaty on the Prohibition of Nuclear Weapons (TPNW)

New START Treaty Expires: First Time Since 1970s With No Nuclear Arms Control

The expiration of the last US-Russia nuclear arms control treaty ends over five decades of binding limits on the world's two largest nuclear arsenals. No replacement is under negotiation. The loss of …

• New START expired on February 5, 2026, ending the last legally binding limits on US and Russian nuclear arsenals — 1,550 deployed strategic …
• This marks the first time since the early 1970s that there are no binding nuclear arms control agreements between the two nations that …