Mourners pay tribute to Boris Nemtsov in Russia

So many came that when the viewing ended after its scheduled four hours, a line of people hundreds of metres long still waited outside the Sakharov Centre, named after the Soviet-era dissident and Nobel Peace Prize laureate Andrei Sakharov.
Nemtsov was shot to death late Friday while walking on a bridge near the Kremlin with a companion. No suspects have been arrested.