How can it be triggered automatically?

4 seconds sound clip from the Dr. Strangelove movie soundboard.

You can hear this line at 00:52:49 in the Blu-ray version of the movie.

Quote context

[...]

- Deterrence is the art of producing in the mind of the enemy the fear to attack.

- And so, because of the automated and irrevocable decision-making process which rules out human meddling, the Doomsday Machine is terrifying.

- Yes, and simple to understand. And completely credible and convincing.

- Gee, I wish we had one of them Doomsday Machines, Stainsey.

- But this is fantastic, Strangelove.

- How can it be triggered automatically?

- Well, it's remarkably simple to do that.

- When you merely wish to bury bombs, there's no limit to the size.

- After that, they are connected to a gigantic complex of computers.

- Now then, a specific and clearly defined set of circumstances under which the bombs are to be exploded is programmed into a tape memory bank.

[...]