This event was first detected internationally by sensors in Forsmark. After this (10[1])event, Anatoly Dyatlov was imprisoned for failing to follow safety procedures. (10[1])The city of Slavutych (10[1])was built to house the people who were evacuated due (10[1])to this event. (10[1])Medals were awarded to the “liquidators” who responded to this event. The New Safe Confinement replaced the concrete “sarcophagus” that was built around the location of this event (10[1])that began after the explosion of Reactor Number Four. For 10 points, name this disaster that occurred at a nuclear power plant near Pripyat in modern-day Ukraine. ■END■