US responds after former Russian President Medvedev's World War III post

The US has responded after former Russian President and Deputy Chairman of Security Council of Russia, Dmitry Medvedev, posted about World War III. "Stoking fears of WWIII is an unfortunate, reckless comment...and unfitting of a world power," US President Donald Trump's envoy Keith Kellogg said. Medvedev's post came after Trump said Russian President Vladimir Putin was playing with fire.