Nuclear Roulette

A Trident II D5 submarine-launched ballistic missile is test-fired in this undated image from Lockheed Martin, which builds the weapon. The new low-yield W76-2 warhead for the missile has raised concerns that it could make it easier to employ nuclear weapons in a conflict. The nuclear Sword of Damocles continues to hang over the world. It lurks in the background, sometimes lost in the cacophony of other, more immediate, crises. Rising global tensions have increased concerns that a...