Lyudmila Navalnaya, the mother of dead Russian opposition leader Alexei Navalny, demanded that President Vladimir Putin hand over her son's body so she could bury him. Navalny, 47, fell unconscious and died suddenly on Friday after a walk at the "Polar Wolf" penal colony above the Arctic Circle where he was serving a three-decade sentence, the prison service said. Speaking in a video filmed in front of the prison as small snowflakes swirled in the air, his mother - dressed in black - complained she did not even know where her son's corpse was and demanded Putin give the order…