America in full panic mode as Russia, China, Iran close the nuclear gap, new W93/Mk7 warhead ready?

Is Washington gearing up for nuclear war or trying to keep deterrence credible in a harsher world? This explainer breaks down the new W93/MK7 warhead, plans for a follow‑on to the Trident D5, the Columbia‑class submarine shift and why the U.S., UK and France are pouring billions into nuclear modernisation as Russia’s threats grow.