Home / Alleged poisoning of Russian opposition leader Aleksei Navalny must be thoroughly investigated / Large-scale Russian Opposition Demonstration Home / Alleged poisoning of Russian opposition leader Aleksei Navalny must be thoroughly investigated / Large-scale Russian Opposition Demonstration Large-scale Russian Opposition Demonstration Alexey Navalny, Russian opposition leader, walks with demonstrators during a rally in Moscow, Russia, on Saturday, Feb. 29, 2019. The rally marked five years since the assassination of politician Boris Nemtsov.