The Chernobyl disaster: Reactor number four at the Chernobyl nuclear power plant, in the Soviet Socialist Republic of Ukraine, melts down during a safety test gone awry.
[added 12/9/2022]
Subsequent Events:
References:
Revolutions of 1989 – Wikipedia
en.wikipedia.org/wiki/Revolutions_of_1989
Chernobyl disaster – Wikipedia
en.wikipedia.org/wiki/Chernobyl_disaster
Current U.s. National Debt:
