"In January 2018, the experts at the Bulletin of the Atomic Scientists moved the hands of the Doomsday Clock to two minutes before midnight, where it had stood during the darkest days of the Cold War, from 1953 to 1960. The latest move of the hands was precipitated by the recklessness in Trump’s nuclear thinking and the deepening crisis over Korea. Acting like a hegemon, the United States, starting in 1999, took advantage of Russian weakness and broke its promise not to expand NATO, eventually adding 13 countries, the last of which was Montenegro, in 2017. When Bush announced plans to incorporate Georgia and Ukraine, Putin drew the line. Following the US-backed Ukrainian coup, he took back Crimea and made clear that there are limits to his toleration of NATO expansion."