[GSlob]

"The morning of the explosion at the Chernobyl nuclear station on April 26, 1986, the Politburo met to discuss the situation, and then organized a government commission to deal with the consequences. "
Garbage. The morning of the explosion all those immediately involved were very busy covering their derrieres and/or trying to deal with the problem locally: "an accident which has not happened does not need to be reported, and an accident which has not not reported did not happen". For the news to make it to the Politburo level in real time, the laws of nature would have to be abolished.

[GSlob]

an accident which has not not reported = an accident which has not been reported