Former Russian president Dmitry Medvedev has become embroiled in a tense back-and-forth on social media that prompted U.S. President Donald Trump to announce he had ordered the re-positioning of two U.

Dmitry Medvedev referenced a rumored Soviet-era nuclear weapon system during an online disagreement with President Trump.

Donald Trump has deployed two nuclear-powered submarines near Russia following inflammatory remarks from a senior Russian security official regarding his Ukraine war deadline. The military manoeuvre threat to Vladimir Putin over the war in Ukraine comes as tensions escalate between Washington and Moscow over the President's demand for Russia to