Russia's opposition supporters march in memory of murdered Kremlin critic Boris Nemtsov in central Saint Petersburg on March 1, 2015. The 55-year-old former first deputy prime minister under Boris Yeltsin was shot in the back several times just before midnight on February 27 as he walked across a bridge a stone's throw from the Kremlin walls. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
