for this hour. rachel has the night off. we ll start off the night in classic rachel fashion. we go back to the archives here. it was october 30th, 1961. and on an island in the russian arctic sea, this happened. the soviet union detonated the most powerful nuclear device ever tested. it remains, believe it or not, til this day, the most powerful nuclear weapon ever detonated. i know this is going to sound almost impossible to comprehend. it was 3,333 times stronger, stronger, than the bomb that was actually dropped on hiroshima. because this was the height of the cold war, because it was at the height of the arms race between the soviet union and the united states, the men who designed this bomb, the men who brought the soviet union to this glory of having the strongest nuclear device in the world, as you can imagine, they were heroes. here is how one of those scientists, andre sakarov, was