The United States is restarting nuclear testing, a move that could rewrite the world’s nuclear playbook. President Donald Trump announced it midair, aboard Marine One, claiming he “had no choice” as Russia and China accelerate their own arsenals. But the ambiguity is intentional, we don’t yet know whether the U.S. plans to test warheads, small explosives, or delivery systems. What’s clear is this: the nuclear clock is ticking again. From Russia’s Burevestnik and Poseidon tests to China’s doubling of warheads in five years, the arms race is heating up and this time, the battlefield needs no borders. With technology bridging oceans, none of the big powers, the U.S., Russia, or China need foreign soil to reach their enemies. And then there’s North Korea, silent, unpredictable, and armed. If Pyongyang can ship shells to Moscow, what stops it from sending something deadlier next?