What happened in Chernobyl is a long-standing interest of mine; I saw all the original news reports when it happened, and we had warnings where I lived at the time not to drink the milk because the radioactive cloud was over the country and it had been raining. I found this video, about the first internet server to be set up in Chernobyl (actualy, Pripyat) following the disaster. Of course, this was still in the early days of the internet. He mentions from around 8:00 in the video that the first internet node was created at the end of 1996, consisting of a few FreeBSD servers; he says the website stayed online until 2015. This was the first public internet node created for Chernobyl, and the servers were actually sited in the centre of Pripyat, in the middle of the exclusion zone. At the time this was an important scientific infrastructure, as international efforts were made to monitor, understand and control the disaster. Quite interesting, and a reminder of how things used to be. It's good to know that FreeBSD played an important role, clearly they needed something that worked reliably. It's also pretty good to be typing this on another FreeBSD machine, 30 years later! 
View: https://www.youtube.com/watch?v=iZKw2H6d1SU&list=PLxAcrYn0Q03-EeVhdN3_OuTiXbO8p0MjB
