On This Day:  April 26

1986 -- A nu­cle­ar re­ac­tor ac­ci­dent oc­curs at Ch­er­nobyl in the Sovi­et re­pub­lic of Ukraine. Var­i­ous sources in the im­me­di­ate af­ter­math put the death toll at be­tween 13 and sev­er­al thou­sand per­sons.