A dosimeter shows the radiation level near a new protective shelter placed over the remains of nuclear reactor Unit 4, at the Chernobyl nuclear power plant in Ukraine, on November 29. The explosion of Unit 4 in the early hours of April 26, 1986, is still regarded as the biggest accident in the history of nuclear power generation. Photo: EPA
A dosimeter shows the radiation level near a new protective shelter placed over the remains of nuclear reactor Unit 4, at the Chernobyl nuclear power plant in Ukraine, on November 29. The explosion of Unit 4 in the early hours of April 26, 1986, is still regarded as the biggest accident in the history of nuclear power generation. Photo: EPA