The distance from test blasts is a massive factor. To add to that, the size of said explosion…is very large. So they built concrete bunkers for observation purposes. Those really helped.
https://www.nps.gov/whsa/learn/historyculture/trinity-site.htm#:~:text=The%20wooden%20observation%20shelters%20were,Gadget%2C%E2%80%9D%20was%20successfully%20detonated.
Latest Answers