For the first time since 1945, America is considering the use of first-strike nuclear weapons. It’s part of an overhaul of the arsenal needed, says the Pentagon, because Russia is building more, smaller nuclear weapons. Although Barack Obama began the US upgrade, President Trump is vastly expanding it, but within the rules of a new nuclear treaty between Russia and America that came into force today. Russia and China have condemned the move and Iran says it brought the world “closer to annihilation”.