The US president said he's ordered two nuclear submarines to move closer to Russia, after a social media spat with Russia's ex-president.

Trump ordered two nuclear submarines to change course in response to social media comments from ormer Russian president Dmitri Medvedev

President Donald Trump issued a rare threat of nuclear escalation on Friday, saying he had ordered two nuclear submarines to be strategically positioned near Russia in response to what he said were aggressive remarks by Dmitry Medvedev,