"The Ruskies had a powerful weapon, all right," I replied. "The only trouble was they used it too late. Fortunately for us we still had time--and our opponents weren't too bright mentally anyway. If they had been it might not have worked. Matter of fact, that's the big thing that licked the Ruskies. We were a bit too shrewd for them. Our military leaders saw right through their weapon." Gramps stamped his foot angrily. "Now look here, Jerry! Stop ramblin' around like that! Just what weapon you talkin' about?" "Propaganda, Gramps. Propaganda, the greatest weapon in the universe--if used right. Now what do you say we get down to work and mine some copper?" We were all laughing as we made our way to the other dome.