German and Belarussian volunteers from German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

German and Belarussian volunteers from German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

German and Belarussian volunteers from German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

German and Belarussian volunteers from German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

Volunteers of German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in a reconstruction of a house in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

Volunteers of German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau take part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

A Volunteer of German charity organisation "Heim-statt Tschernobyl e.V." (Houses instead of Chernobyl) and its Belarussian partner OkoBau takes part in the construction of treatment facilities in the village of Stakhovtsy, Belarus, August 6, 2019. REUTERS/Vasily Fedosenko

Belarusian Catholics erect a wooden cross as they take part in a procession celebrating Palm Sunday in the town of Oshmyany, Belarus, April 14, 2019. REUTERS/Vasily Fedosenko

Belarussian Catholics kiss a wooden cross set up after a procession celebrating Palm Sunday in the town of Oshmyany, Belarus, April 14, 2019. REUTERS/Vasily Fedosenko

Belarusian Catholics carry a wooden cross as they take part in a procession celebrating Palm Sunday in the town of Oshmyany, Belarus, April 14, 2019. REUTERS/Vasily Fedosenko

Belarusian Catholics carry a wooden cross as they take part in a procession celebrating Palm Sunday in the town of Oshmyany, Belarus, April 14, 2019. REUTERS/Vasily Fedosenko

Belarusian Catholics carry a wooden cross as they take part in a procession celebrating Palm Sunday in the town of Oshmyany, Belarus, April 14, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko welcomes Zimbabwe's President Emmerson Mnangagwa to their meeting in Minsk, Belarus January 17, 2019. Natalia Fedosenko/Pool via REUTERS

Belarussian President Alexander Lukashenko speaks during his meeting with Zimbabwe's President Emmerson Mnangagwa (not pictured) in Minsk, Belarus January 17, 2019. Natalia Fedosenko/Pool via REUTERS

Zimbabwe's President Emmerson Mnangagwa speaks during his meeting with Belarussian President Alexander Lukashenko (not pictured) in Minsk, Belarus January 17, 2019. Natalia Fedosenko/Pool via REUTERS

Belarussian President Alexander Lukashenko walks to the meeting with Zimbabwe's President Emmerson Mnangagwa (not pictured) in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko welcomes Zimbabwe's President Emmerson Mnangagwa to their meeting in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko welcomes Zimbabwe's President Emmerson Mnangagwa to their meeting in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Zimbabwe's President Emmerson Mnangagwa arrives to the meeting with Belarussian President Alexander Lukashenko (not pictured) in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko shakes hands with Zimbabwe's President Emmerson Mnangagwa during their meeting in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko welcomes Zimbabwe's President Emmerson Mnangagwa to their meeting in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko and Zimbabwe's President Emmerson Mnangagwa inspect honor guards during welcome ceremony in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko and Zimbabwe's President Emmerson Mnangagwa inspect honor guards during welcome ceremony in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko and Zimbabwe's President Emmerson Mnangagwa listen national anthems in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko welcomes Zimbabwe's President Emmerson Mnangagwa to their meeting in Minsk, Belarus January 17, 2019. REUTERS/Vasily Fedosenko

Russian President Vladimir Putin (R) speaks with his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin attends a meeting with his Belarussian counterpart Alexander Lukashenko in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) meets with his Belarussian counterpart Alexander Lukashenko in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) embraces his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) meets with his Belarussian counterpart Alexander Lukashenko in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) meets with his Belarussian counterpart Alexander Lukashenko in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting in Moscow, Russia December 29, 2018. Kirill Kudryavtsev/Pool via REUTERS

Russian President Vladimir Putin attends a meeting with his Belarussian counterpart Alexander Lukashenko at the Kremlin in Moscow, Russia December 25, 2018. Alexander Nemenov/Pool via REUTERS

Russian President Vladimir Putin enters a hall before a meeting with his Belarussian counterpart Alexander Lukashenko at the Kremlin in Moscow, Russia December 25, 2018. Alexander Nemenov/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting at the Kremlin in Moscow, Russia December 25, 2018. Alexander Nemenov/Pool via REUTERS

Russian President Vladimir Putin (R) meets with his Belarussian counterpart Alexander Lukashenko at the Kremlin in Moscow, Russia December 25, 2018. Alexander Nemenov/Pool via REUTERS

Russian President Vladimir Putin (R) shakes hands with his Belarussian counterpart Alexander Lukashenko during a meeting at the Kremlin in Moscow, Russia December 25, 2018. Alexander Nemenov/Pool via REUTERS

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko reacts during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

Belarussian President Alexander Lukashenko speaks during a meeting with the media in Minsk, Belarus December 14, 2018. REUTERS/Vasily Fedosenko

(R-L) Russian President Vladimir Putin, Moldovan President Igor Dodon and Belarussian President Alexander Lukashenko attend a meeting of the Supreme Eurasian Economic Council in St. Petersburg, Russia December 6, 2018. Olga Maltseva/Pool via REUTERS

Russian President Vladimir Putin (R) speaks with his Belarussian counterpart Alexander Lukashenko before a meeting of the Supreme Eurasian Economic Council in St. Petersburg, Russia December 6, 2018. Olga Maltseva/Pool via REUTERS

The official mascot of the 2nd European Games, which will take place in June 2019 in Belarussian capital, is seen during its presentation in Minsk, Belarus November 29, 2018. REUTERS/Vasily Fedosenko

Girls from cheerleading group wait for their performance during presentation of the official mascot of the 2nd European Games, which will take place in June 2019 in Belarussian capital, in Minsk, Belarus November 29, 2018. REUTERS/Vasily Fedosenko

Girls from cheerleading group wait for their performance during presentation of the official mascot of the 2nd European Games, which will take place in June 2019 in Belarussian capital, in Minsk, Belarus November 29, 2018. REUTERS/Vasily Fedosenko

Azeri President Ilham Aliyev attends a meeting with his Belarussian counterpart Alexander Lukashenko in Minsk, Belarus November 19, 2018. REUTERS/Vasily Fedosenko

Azeri President Ilham Aliyev attends a meeting with his Belarussian counterpart Alexander Lukashenko in Minsk, Belarus November 19, 2018. REUTERS/Vasily Fedosenko

Azeri President Ilham Aliyev attends a meeting with his Belarussian counterpart Alexander Lukashenko in Minsk, Belarus November 19, 2018. REUTERS/Vasily Fedosenko