I have been informed that the inhabitants of Earth have succeeded in releasing atomic energy and have been making experiments with rocket propulsion...

(Atomic explosions on Earth)

Equip an expedition to the satellite of Earth immediately. It is to keep a close watch on the planet and to report at once if rocket experiments are in progress. The greatest care must be taken to keep our presence on the Moon a secret...

From: C.B.E.P.S.
To: President.
Draft herewith:
People of Earth!

We, the inhabitants of the planet you call Mars, have for many years observed your experiments towards achieving interplanetary travel. These experiments must cease. Our study of your race has convinced us that you are not fitted to leave your planet in the present state of your civilization.

They had begun to realize that we were intercepting all their radio transmissions, and some messages have been broadcast directly to us. They state that they have agreed to ban all rocket experiments, in accordance with our wishes. This is as unexpected as it is welcome. Even if they are trying to deceive us, we are perfectly safe now that we have established the second station just outside the atmosphere. They cannot possibly develop spaceships without our seeing them or detecting their tube radiation.