The airship XY-21, which crashed into the Mediterranean sea on the 11th, was a single-stage, astro-propelled rocket launched 13 months ago from a site within the United States.

13 seconds sound clip from the 20 Million Miles to Earth (1957) movie soundboard.

You can hear this line at 00:58:16.019 in the Blu-ray version of the movie.

Quote context

[...]

- Good morning, ladies and gentlemen of the press.

- I am fully aware of the rumors That began with an air crash ten days ago off the coast of Sicily.

- Not until now have I received permission to make known the facts exactly as they are.

- This cablegram has been signed by the United States secretary of defense.

- In the face of widespread speculation, and after consultation with various foreign governments, the president has authorized release of all information to press and news agencies for their immediate publication.

- The airship XY-21, which crashed into the Mediterranean sea on the 11th, was a single-stage, astro-propelled rocket launched 13 months ago from a site within the United States.

- The rocket, with its complement of 17 men, had landed on the planet Venus.

- Venus?

- The planet Venus?

- Had landed on the planet Venus and was on the return flight to earth when the ship plunged into the sea.

- There was one survivor, Colonel Calder, seated beside me, commander of the expedition.

- Some of you may also have heard the story of a monster now confined here in Rome's zoo. That beast is from Venus.

- It is an essential object of scientific study if man is to survive the atmosphere on Venus, poisonous to humans.

[...]