'Poisoned' Russian opposition leader Alexei Navalny is Putin's fiercest critic

Before he found himself fighting for his life after a suspected poisoning, Kremlin critic Alexei Navalny was traveling through Siberia urging Russians to vote against Vladimir Putin's cronies in upcoming local elections. Navalny, 44, openly denounced Putin as "the tsar of corruption" and referred to the Russian leader's party as a group of "crooks and...