The target for the A-bomb is this nest of Martian machines in the Puente Hills, where more of these meteor-cylinders came down early last evening.
10 seconds sound clip from the The War of the Worlds (1953) movie soundboard.
You can hear this line at 00:59:54 in the DVD version of the movie.
Quote context
[...]
- The Flying Wing is gonna carry it.
- Hello, tower, this is Air Force Flying Wing, ready for takeoff, over.
- Flying Wing, this is the tower. Clear for take-off, over.
- A plane will pinpoint the target for the drop from six miles up.
- Nothing like this has ever been exploded before, and we're gonna be pretty darn close.
- But there are observers down in the valley in a forward bunker.
- Well, they'll be a lot nearer than us.
[...]