This is Moscow!
3 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:04:01 in the radio play.
Quote context
[...]
- The thing was noticed in Hong Kong first on the British radar.
- But that's impossible! That thing must be doing about four thousand.
- That can't be aircraft, sir. Must be a buzz bomb.
- Better give an alarm. Keep it steady, though. May be faulty equipment.
- There was something very gravely wrong forty miles out in space, far above the earth.
[...]