Police officers detain a man during an unauthorised anti-corruption rally in central Moscow on March 26, 2017. Thousands of Russians demonstrated across the country on March 26 to protest at corruption, defying bans on rallies which were called by prominent Kremlin critic Alexei Navalny -- who was arrested along with scores of others. Navalny called for the protests after publishing a detailed report this month accusing Prime Minister Dmitry Medvedev of controlling a property empire through a shadowy network of non-profit organisations.   / AFP PHOTO / Vasily MAXIMOV        (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)