Yes, they have some sort of electronic umbrella. It's quite impenetrable.
5 seconds sound clip from the The War of the Worlds (1953) movie soundboard.
You can hear this line at 00:40:04 in the DVD version of the movie.
Quote context
[...]
- I'd say our effective losses were nearly 60 percent men, 90 percent materiel.
- Well, the jets went in, but not one of them came out.
- I launched high-level bombers, dropped everything they can carry.
- They were knocked out of the sky and their bombs did nothing. Nothing was effective against them.
- Yes, they have some sort of electronic umbrella. It's quite impenetrable.
- Dr. Forrester believes they generate atomic force without the heavy screening we use.
- That's where they get the power for their rays.
- Call Victorville. Tell them I want the fastest plane they've got.
- You'll get further instructions from Sixth Army Command.
[...]