As they stepped from the cage onto the platform of the third stage, Marsh heard the speaker below call out: “X minus twenty minutes.” There were eleven engineers and workmen on the platform readying the compartment that Marsh would occupy. Marsh suddenly felt helpless and alone as he faced the small chamber that might very well be his death cell. Its intricate dials and wires were staggering in their complexity. Marsh turned and shook hands with Colonel Tregasker. “Good-by, sir,” he said in a quavering voice. “I hope I remember everything the Corps taught me.” He tried to smile, but his facial muscles twitched uncontrollably. “Good luck, son—lots of it,” the officer said huskily. Suddenly he leaned forward and embraced the youth with a firm, fatherly hug. “This is not regulations,” he mumbled gruffly, “but hang regulations!” He turned quickly and asked to be carried down to the ground. A man brought Marsh’s helmet and placed it over his head, then clamped it to the suit. Knobs on the suit were twisted, and Marsh felt a warm, pressurized helium-oxygen mixture fill his suit and headpiece. Marsh stepped through the hatch into the small compartment. He reclined in the soft contour chair, and the straps were fastened by one of the engineers over his chest, waist, and legs. The wires connected to various parts of his body had been brought together into a single unit in the helmet. A wire cable leading from the panel was plugged into the outside of the helmet to complete the circuit. Final tests were run off to make sure everything was in proper working order, including the two-way short-wave radio that would have to penetrate the electrical ocean of the ionosphere. Then the double-hatch air lock was closed. Through his helmet receiver, Marsh could hear the final minutes and seconds being called off from inside the blockhouse. “Everything O.K.?” Marsh was asked by someone on the platform. “Yes, sir,” Marsh replied. “Then you’re on your own,” were the final ominous words. “X minus five minutes,” called the speaker. It was the longest five minutes that Marsh could remember. He was painfully aware of his cramped quarters. He thought of the tons of explosive beneath him that presently would literally blow him sky-high. And he thought of the millions of people the world over who, at this moment, were hovering at radios and TV’s anxiously awaiting the dawn of the space age. Finally he thought of Dad and Mom, lost in that multitude of night watchers, and among the few who were not primarily concerned with the scientific aspect of the experiment. He wondered if he would ever see them again. “X minus sixty seconds!” Marsh knew that a warning flare was being sent up, to be followed by a whistle and a cloud of smoke from one of the blockhouses. As he felt fear trying to master him, he began reviewing all the things he must remember and, above all, what to do in an emergency. “X minus ten seconds—five—four—three—two—one—FIRE!”