Relatives visit the graves of those who died in the Kursk submarine disaster at Saint Petersburg's Serafimovskoe cemetery during a memorial ceremony on the 20th anniversary of the tragedy on August 12, 2020. On August 12, 2000, the accidental explosion of a torpedo caused the sinking of the nuclear submarine Kursk, flagship of the Russian Navy. (Photo by Olga Maltseva/AFP Photo)
