The US has responded to the Kremlin’s threatening rhetoric, which announced plans to conduct military exercises involving nuclear weapons. In Washington, officials advised Russian dictator Vladimir Putin to withdraw troops from Ukraine if he fears Western military assistance to Kyiv, citing a statement by the coordinator of the US National Security Council on strategic communications, John Kirby. Kirby said that if Putin and Russian officials are concerned that their troops in Ukraine may be hit by weapons made in other countries, the easiest way to avoid this is simply to withdraw their troop…