MOSCOW, Russia – Alexei Navalny, Russian President Vladimir Putin’s most formidable domestic opponent, fell unconscious and died on Friday after a walk at the “Polar Wolf” Arctic penal colony where he was serving a three-decade sentence, authorities said. The death of Navalny, a 47-year-old former lawyer, robs the disparate Russian opposition of its most courageous leader as Putin prepares for an…
