This is amazing.
4 seconds sound clip from the The War of the Worlds (1953) movie soundboard.
You can hear this line at 00:30:51 in the DVD version of the movie.
Quote context
[...]
- There's something moving in the gully.
- Is that some kind of a flying machine?
- They must keep the opposing poles in balance and lift the machine.
- All command posts, stand by to fire.
- But, colonel, shooting's no good.
- It's always been a good persuader.
- Shouldn't you try to communicate with them first and shoot later if you have to?
[...]