Last US-Russia nuclear treaty is expiring: Does it really matter? The New START treaty, which limits strategic nuclear weapons, is to expire this week.Share this: Russia criticises US as final nuclear warhead treaty set to expireDateFebruary 4, 2026In relation toAl-JazeeraRussia says will act responsibly despite New START nuclear treaty expiryDateFebruary 5, 2026In relation toAl-JazeeraRussia says it will stick to limits of expired nuclear treaty if US doesDateFebruary 11, 2026In relation toAl-Jazeera