"It's too risky for you to go alone, Johnny," Rick Norman said. "Wait till I get through showing the Senator around the mine. Then if you still think your gravity gadget can get us to Vulcan against Sun drag, we'll go look into this Fountain of Youth business together." He knew Johnny wasn't paying any attention to his argument, however, and as he talked his big fingers were busy under the table unfolding the wax paper from the two small green capsules—Martian knockout drops. Two of them would b