As partners in Russia's struggling opposition movement, Garry Kasparov and Boris Nemtsov didn't always have the smoothest of friendships. But the former chess champion says his respect for Nemtsov - shot dead at age 55 a stone's throw from the Kremlin walls - is absolute.
Radio Free Europe/Radio Liberty: Kasparov says ‘Putin is accountable for this bloodshed’
Russia's opposition supporters march in memory of murdered Kremlin critic Boris Nemtsov in central Saint Petersburg on March 1, 2015.
