An eldery woman ties a ribbon around a cross at a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

Members of a Belarus family visit the grave of their relatives at a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

A man repairs a cross at a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

A man ties a ribbon around a cross at a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

A woman kisses a picture of a departed woman at a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

People drink and eat as they picnic near a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY

People drink and eat as they picnic near a cemetery in the village of Orevichi, inside the exclusion zone around the Chernobyl nuclear reactor, some 390 km of Minsk, during Radunitsa day (Radonitsa, Radonica or Radunica), the Russian Orthodox Church commemoration of the departed, on April 17, 2018. The explosion at reactor number four of the Chernobyl power plant on April 26, 1986 sent radioactive fallout into the atmosphere that spread across Europe, particularly contaminating Belarus, Ukraine and Russia. / AFP PHOTO / MAXIM MALINOVSKY