 Why were the Space Scouts sent on their mission?
So when the Chief of World Security told him that he had been selected as the answer to the Solar System's greatest mystery, Jery assumed that it was because of his mental agility. But when he got to Mars to find out why fifteen boys had vanished from a spaceship in mid-space, he found out that even his quick mind needed time to pierce the maze of out-of-this-world double-dealing. For Jery had become a walking bomb, and when he set himself off, it would be the end of the whole puzzle of THE SECRET MARTIANS—with Jery as the first to go! After sixteen years of education, Jack found himself teaching high school English in Chicago, a worthwhile career, but "not what one would call zesty." After a two-year Army hitch, and a year in advertising "sublimating my urge to write things for cash," Jack moved to New York, determined to make a career of full-time fiction-writing. I didn't quite believe it at first, when I looked up and saw them, six-feet-plus of steel nerves and gimlet eyes, staring down at me, amidst my litter of sketches, crumpled copy sheets and deadline memos. Mostly, I ran back over all the ads I'd created and/or okayed for Solar Sales, Inc. during my five years with the firm, trying to see just where I'd gone and shaken the security of the government. Yes," I said, some terrified portion of my mind waiting masochistically for them to draw their collapsers and reduce me to a heap of hot protons. I rose from my place, slipped my jacket from its hook, and started across the office toward the door, each of them falling into rigid step beside me. Security men were not hired for their loquaciousness. They had a car waiting at the curb downstairs, in the No Parking zone. Because the speaker was Philip Baxter, Chief of Interplanetary Security, second only to the World President in power, and not even that in matters of security. Honest, sober, civic-minded, slightly antisocial...." But if I spot it in less, they throw it out and start over again. And your job is to test these ads, before they reach the public.
 to symbolize peace and harmony amongst the nations
 to research the environment on Mars  to symbolize peace and harmony amongst the nations  to show that anyone can travel in outer space  because the Brain told them to do so