The Long Shadow of Chernobyl. Control Room, Unit #4. "On April 26, 1986 at 1:23 A.M., Chernobyl Nuclear Power Plant operators committed a fatal series of errors in the control room of reactor number four, triggering a meltdown that resulted in the world's largest nuclear accident to date. Twenty years later, the long shadow of Chernobyl continues to darken lives—socially, environmentally and physically."