Putin critic Alexei Navalny in coma after possible poisoning

Read MoreAlexei Navalny, a prominent critic of the Kremlin and Russian President Vladimir Putin, is fighting for his life in a coma. Following international uproar, Navalny was flown to Germany for medical treatment. Chris Livesay reports.Alexei Navalny, a prominent critic of the Kremlin and Russian President Vladimir Putin, is fighting for his life in a coma. Following international uproar, Navalny was flown to Germany for medical treatment. Chris Livesay reports.