KYIV/LVIV, Ukraine (Reuters) – U.S. President Joe Biden sought to prevent Beijing giving new life to Russia’s invasion of Ukraine in a video call with his Chinese counterpart on Friday as stalled Russian forces pressed on with bombardments of towns and cities. With Russia looking to regain the initiative, three missiles landed at an airport near Lviv, a western city where hundreds of thousands thought they had found refuge far from Ukraine’s battlefields. The Russian defence ministry said it was “tightening the noose” around the besieged southern port of Mariupol, where officials said more tha…