Ukrainian President Volodymyr Zelensky said on Saturday that Washington had proposed the first face-to-face negotiations between Ukraine and Russia in half a year, as diplomats converged on Miami for fresh talks on ending the war.Russian envoy Kirill Dmitriev said he was heading to Miami, while Ukrainian and European teams were also in the sunny American city for the negotiations, mediated by Donald Trump's envoy Steve Witkoff and the US president's son-in-law Jared Kushner.