Well, maybe the physical part is TnT, but the nuclear part is all in the mind.
A very amusing documentary to listen to, if you are convinced that nukes are a hoax.
Funny parts: the missile testing is done near Disneyworld, at Cape Canaveral. No other test launching is done.
The special letter from the British prime minister is held in a safe, which is in a safe, which is in another safe describing what to do if Britain is completely obliterated. I can just imagine the letter is probably one big happy face that says “don’t worry it’s all a joke!“
The original passage is at the beginning of this old episode of This American Life.