Russian opposition parties are joining forces to take on the Kremlin in regional elections, spurred on by the murder of their ally, Boris Nemtsov.
Bloomberg: Nemtsov murder unites Russian opposition in challenge to Kremlin
People gather on April 7, 2015 at the site, where Russian opposition leader Boris Nemtsov was shot dead, near Saint-Basil's Cathedral, in central Moscow to mark 40 days since protest leader was assassinated just a stone's throw away from the Kremlin.
