Decorated Ukrainian National Guard soldiers and State Emergency Service units members observe a minute of silence during a ceremony commemorating the Chernobyl nuclear power plant disaster, at the Those Who Saved the World monument in Chernobyl, Ukraine, Tuesday, April 26, 2022. AP

Giant protective dome built over the sarcophagus covering the destroyed fourth reactor of the Chernobyl Nuclear Power Plant on April 26, 2022. AFP

Ukrainian National Guard of Ukraine servicemen stand guard at entrance to Chernobyl Nuclear Power Plant Chernobyl Nuclear Power Plant on April 26, 2022 on the 36th anniversary of the world s worst nuclear disaster. AFP

Clean-up operation veterans pay respect to the Chernobyl firefighters to mark the 36th anniversary of the Chernobyl nuclear disaster, at a memorial in the capital Kyiv, Ukraine, Tuesday, April 26, 2022. AP

Ukrainian servicemen stand next to the monument in Chernobyl to pay tribute to the firefighters who died during 1986 Chernobyl disaster at the Chernobyl Nuclear Power Plant, on April 26, 2022. AFP

A Ukrainian serviceman stands guard next to the monument in hommage to the firefighters who died during Chernobyl disaster at the Chernobyl Nuclear Power Plant on April 26, 2022. AFP