Today in Ukraine an international team of engineers is racing to assemble one of the most complex super structures ever built, at an extraordinary 36,000 tones it will be the largest structure moved on land. A mega dome tasked to entomb the crumbling remains of the Chernobyl nuclear reactor.

In 1986 the Chernobyl nuclear reactor exploded releasing 400 times more radiation than the Hiroshima bomb it was officially the worlds worst nuclear disaster. Thirty workers died, 50,000 people fled the nearest city and radioactive fallout turned an area larger than Lancashire in the United Kingdom into a no go zone.

Thirty years on as scientists investigate the true impact of the disaster the shell of the nuclear reactor is collapsing. Engineers must now battle to prevent another escape of deadly radiation all whilst fighting freezing weather and lethal radiation. This is the inside story of the race to build Chernobyl’s Mega Tomb.