MOSCOW, RUSSIA - MARCH 03:  Mourners pay their last respects at the coffin of Russian opposition leader Boris Nemtsov  during a farewell ceremony on March 03, 2015 in  Moscow, Russia.   Nemtsov was murdered on Bolshoi Moskvoretsky bridge near St. Basil cathedral just few steps from the Kremlin on February 27.  Nemtsov, a fierce critic of President Vladimir Putin, was shot dead ahead of a major opposition rally this weekend. (Photo by Alexander Aksakov/Getty Images)