The suspected poisoning of Russian dissident Alexei Navalny

Alexei Navalny is the most prominent opposition figure in Russia, an anti-corruption crusader and a frequent Kremlin critic. But right now, Navalny is comatose in a German hospital after a suspected poisoning. Today on Front Burner, Chris Brown from CBC's Moscow bureau explains why Navalny might have been targeted, by whom, and the potential fallout.