When they are exploded, they will produce a doomsday shroud, a lethal cloud of radioactivity which will encircle the Earth for 93 years.
14 seconds sound clip from the Dr. Strangelove movie soundboard.
You can hear this line at 00:49:42 in the Blu-ray version of the movie.
Quote context
[...]
- Our studies show that even the worst fallout is down to a safe level after two weeks.
- You've obviously never heard of Cobalt Thorium G.
- Cobalt Thorium G has a radioactive half-life of 93 years.
- If you take, say, 50 H-bombs in the hundred megaton range and jacket them with Cobalt Thorium G...
- Oh, what a load of commie bull. I mean, after all...
- I'm afraid I don't understand something, Alexi.
- Is the premier threatening to explode this if our planes carry out their attack?
- No, sir. It is not a thing a sane man would do.
[...]