CHORNOBYL, UKRAINE - SEPTEMBER 29:  A memorial lists the names of the 86 villages evacuated and abandoned following the Chernobyl nuclear disaster inside the Chernobyl Exclusion Zone on September 29, 2015 in Chornobyl, Ukraine. The Chernobyl Exclusion Zone is a 2,600 square kilometer restricted access zone established in the contaminated area around the Chernobyl nuclear power plant. On April 26, 1986, technicians at Chernobyl conducting a test inadvertently caused reactor number four to explode, creating the worst nuclear accident in history. Authorities evacuated 120,000 people from surrounding towns and villages. Workers employed at Chernobyl today and a small number of returnees live at selected sites in the Zone's outer region, though no one is allowed to live in the inner zone, where hot spots of radiation make the area uninhabitable for thousands of years to come.  (Photo by Sean Gallup/Getty Images)