Liquidation of the consequences of the Chernobyl accident

USSR. Ukrainian SSR. Kiev region. Specialists from the scientific and production association "Sibtsvetmetavtomatika" and the All-Union construction and assembly association "Soyuzatomenergostroy" during testing of the radio-controlled tractor DET-250 at a temporary testing ground for special equipment designed to work in the area of the damaged reactor at the V. I. Lenin Chernobyl Nuclear Power Plant. On April 26, 1986, an explosion occurred at the fourth power unit of the NPP during equipment testing during the reactor shutdown for routine preventive maintenance. Valery Zufarov/TASS