(FILES) In this file photo taken on March 10, 2011, Russian Prime Minister Vladimir Putin (R) shakes hands with US Vice President Joe Biden during their meeting in Moscow. - US President Joe Biden in his first phone call with Vladimir Putin since taking office raised concerns with the Kremlin leader over the poisoning of opposition leader Alexei Navalny and Russian "aggression" against Ukraine, the White House said on January 26, 2021. (Photo by ALEXEY DRUZHININ / POOL / AFP)