In the early hours of April 26, 1986, an explosion shook the small Ukrainian city of Pripyat. Inside Reactor 4 of the Chernobyl Nuclear Power Plant, a late-night safety test had gone wrong. A series of design flaws and rushed decisions caused the reactor to overheat and then explode, sending radioactive material miles into the sky.
But the disaster didn’t end with the explosion. In many ways, it began there.

