CHERNOBYL, Ukraine — There is a massive scar on the only thing standing between a decades-old nuclear disaster and the potential for another. The tomb burying the remains of the catastrophic ...

As Ukraine marks the 39th anniversary of the world's worst civilian nuclear accident at the Chernobyl power plant, engineers ...

On April 26, 1986, Reactor No 4 of the Chernobyl Nuclear Power Plant, located in what is now Ukraine, exploded during a late-night safety test gone wrong. The blast released radioactive material ...