With the New START treaty expiring, the United States and Russia are now entering uncharted nuclear territory. This video breaks down what happens next as the last remaining limits on the world’s two largest nuclear arsenals disappear. From the end of inspections and data sharing to the possibility of rapidly expanding deployed warheads, the risks of mistrust, escalation, and a renewed global arms race are rising fast. We examine how this shift could reshape global security, strain diplomacy, and undermine decades of nuclear restraint at a moment of growing international instability.