CHORNOBYL, UKRAINE – SEPTEMBER 29: A worker makes a phone call in the control room of reactor number two inside the former Chernobyl nuclear power plant on September 29, 2015 near Chornobyl, Ukraine. The Chernobyl plant is currently undergoing a decades-long decommissioning process of reactors one, two and three, which continued operation for years following the accident at reactor four. On April 26, 1986, technicians at Chernobyl conducting a test inadvertently caused reactor number four, which contained over 200 tons of uranium, to explode, flipping the 1,200 ton lid of the reactor into the air and sending plumes of highly radioactive particles and debris into the atmosphere in a deadly cloud that reached as far as western Europe. 32 people, many of them firemen sent to extinguish the blaze, died within days of the accident, and estimates vary from 4,000 to 200,000 deaths since then that can be attributed to illnesses resulting from Chernobyl’s radioactive contamination. Today large portions of the inner and outer Chernobyl Exclusion Zone that together cover 2,600 square kilometers remain contaminated. A consortium of western companies is building a movable enclosure called the New Safe Confinement that will cover the reactor remains and its fragile sarcophagus in order to prevent further contamination. (Photo by Sean Gallup/Getty Images)

PRIPYAT, UKRAINE – SEPTEMBER 30: In this aerial view an abandoned ferris wheel stands on a public space overgrown with trees in the former city center on September 30, 2015 in Pripyat, Ukraine. Pripyat lies only a few kilometers from the former Chernobyl nuclear power plant and was built in the 1970s to house the plant’s workers and their families. On April 26, 1986, technicians at Chernobyl conducting a test inadvertently caused reactor number four to explode, sending plumes of highly radioactive particles and debris into the atmosphere. Authorities evacuated 120,000 people from the area, including 43,000 from Pripyat. Today Pripyat is a ghost-town, its apartment buildings, shops, restaurants, hospital, schools, cultural center and sports facilities derelict and its streets overgrown with trees. The city lies in the inner exclusion zone around Chernobyl where hot spots of persistently high levels of radiation make the area uninhabitable for thousands of years to come. (Photo by Sean Gallup/Getty Images)

PRIPYAT, UKRAINE – SEPTEMBER 30: Dolls and stuffed animals lie in the “Zlataya ribka” (“Golden little fish”) abandoned kindergarten on September 30, 2015 in Pripyat, Ukraine. Pripyat lies only a few kilometers from the former Chernobyl nuclear power plant and was built in the 1970s to house the plant’s workers and their families. On April 26, 1986, technicians at Chernobyl conducting a test inadvertently caused reactor number four to explode, sending plumes of highly radioactive particles and debris into the atmosphere. Authorities evacuated 120,000 people from the area, including 43,000 from Pripyat. Today Pripyat is a ghost-town, its apartment buildings, shops, restaurants, hospital, schools, cultural center and sports facilities derelict and its streets overgrown with trees. The city lies in the inner exclusion zone around Chernobyl where hot spots of persistently high levels of radiation make the area uninhabitable for thousands of years to come. (Photo by Sean Gallup/Getty Images)