Hundreds of Russians visited the grave of dead Russian opposition leader Alexei Navalny on Saturday, risking arrest to pay tribute to the anti-corruption campaigner for a second day running. Navalny, President Vladimir Putin’s fiercest critic for more than a decade, died in an Arctic prison colony last month, where he was serving a 19-year sentence on “extremism” charges largely seen as political retribution for his opposition to the Kremlin. An AFP journalist saw mourners, some with tears in their eyes, queueing outside the Borisovo cemetery in southern Moscow on Saturday afternoon, as more w…