LONDON, Jan 30 (Reuters) - Russia told the United States on Monday that the last remaining pillar of bilateral nuclear arms control could expire in 2026 without a replacement due to what it said were U. The United States said in its 2022 Nuclear Posture Review that Russia and China were expanding and modernising their nuclear forces, and that Washington would pursue an approach based on arms control to head off costly arms races. "Expiration of the Treaty without a follow-on agreement would leave Russia free to expand strategic nuclear forces that are now constrained, as well as novel intercontinental-range and regional systems that are not currently limited by the Treaty," according to the U