Russia released secret footage of history's largest man-made explosion — a nuclear blast thousands of times stronger than Hiroshima

[Costas]

Now, Russia is offering a behind-the-scenes look at the moments leading up to the detonation of that hydrogen bomb, known officially as RDS-220 and informally as Tsar Bomba.

https://www.businessinsider.com/russia-declassified-footage-of-largest-nuclear-blast-tsar-bomba-2020-9