A safe passage through one of the most dangerous places on earth. On April 26, 1986, Reactor number 4 at the Chernobyl Nuclear Power Plant, located in Ukraine, exploded. Nearly nine tons of radioactive materials - 90 times as much as the Hiroshima bomb - were hurled into the sky. The explosion took place at around one in the morning while the neighboring town of Pripyat slept. Only forty hours later, the residents of Pripyat were ordered to evacuate, and most never returned.