Chernobyl Disaster 1986: What Really Happened?

References:

https://www.youtube.com/watch?v=eB1vfga9Y_c
https://www.youtube.com/watch?v=uvpS2lUHZD8
https://www.britannica.com/event/Chernobyl-disaster
https://world-nuclear.org/information-library/safety-and-security/safety-of-plants/chernobyl-accident.aspx
https://www.historyextra.com/period/20th-century/chernobyl-disaster-1986-reactor-four-what-happened-why-when-facts/
https://www.nrc.gov/reading-rm/doc-collections/fact-sheets/chernobyl-bg.html