Putin confidant warns: Nuclear attack is “most likely” coming. Putin threatens to use nuclear weapons if Western troops fight in Ukraine.
Secret files show that Russia's threshold for nuclear war is lower than expected. Some secret Russian documents contain discussions of war games and reportedly set operational thresholds for the first use of so-called tactical or non-strategic nuclear weapons. A mushroom cloud rises over the Nevada desert after an atomic bomb explodes. The U.S. is also preparing for such a scenario.