It'll be a moving target. Prepare to follow up.
4 seconds sound clip from the The War of the Worlds (1953) movie soundboard.
You can hear this line at 00:32:25 in the DVD version of the movie.
Quote context
[...]
- I think we should try to make them understand we mean them no harm.
- There's another machine coming out.
- They are living creatures out there.
- Dr. Forrester says they're some kind of advanced civilization.
- If they're more advanced than us, they should be nearer the Creator for that reason.
- It'll be a moving target. Prepare to follow up.
- No real attempt has been made to communicate with them, you know?
- Let's go back inside, Uncle Matthew.
- I've done all I can in there. You go back.
- Sylvia, I like that Dr. Forrester. He's a good man.
- Attention, all batteries, prepare for volley fire. Repeat, prepare for volley fire.
[...]