On October 30, 1961, the USSR detonated RDS-220, aka the Tsar Bomba, the most powerful nuclear bomb ever tested. The hydrogen bomb blast yielded the explosive force of around 50 megatons of TNT. That's more than 3,000 times more destructive than the US bomb dropped on Hiroshima. From the New York Times:
In an interview, Alex Wellerstein, a nuclear historian at the Stevens Institute of Technology in Hoboken, N.J., called the release "a nice addition" to the growing body of public information. He said the bomb's description in the video documentary was much fuller than the public would normally receive, but nonetheless carefully avoided the secret technical details "despite appearing to show the innards."
