disaster in a halo

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Chernobyl nuclear power plan disaster, soviet Mil Mi-26 “Halo” helicopters spraying coagulant agents around the stricken plant and surrounding areas, in order to force radiation particles floating in the air to precipitate onto the ground, to prevent further expansion of the nuclear contamination, and to enable ground personnel to collect and bury the now contaminated soil. 

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Chernobyl disaster, Mil Mi-26 “Halo” helicopters, the biggest currently in service, dropping chemicals to settle the radioactive dust into the ground.

These machines would latter be abandoned on site as they became too radioactive to be safely used, and it’s said a third of all helicopter crews, specially those who first responded to the disaster, would develop cancer a few years after it.