US President Joe Biden said the world was at its highest risk of “Armageddon” since the 1962 Cuban missile crisis in comments at a fundraiser on Thursday amid Russia’s war on Ukraine. Biden said Russian President Vladimir Putin was “not joking” when he talks about potentially using nuclear, biological or chemical weapons, according to his remarks as reported by the White House press pool. Biden said he didn’t think there was any way to use a tactical nuclear weapon and not end up with “Armageddon.” Russia recently annexed four Ukrainian regions, in a move that violated international law, and P…