Prochaska was the last to finish. Crag waited impatiently for him to switch on his oxygen valve before picking up the bomb. He motioned the others to stand back and began opening the dogs which secured the escape hatch. He hesitated on the last one. The escaping air could whisk him into space in a flash. The same thing had happened to crewmen riding in bubbles that broke at high altitude. Whoosh! He'd be gone! Conceivably, it could suck the cabin clean. Fortunately their gear had been secured as protection against the high g forces of escape. Too late to lash himself with the seat harnessing. Time was running out. Panic touched his mind. Calm down, Crag, he told himself. Play it cool, boy. Prochaska saw his dilemma at the same instant. He squatted on the deck and thrust his legs straight out from the hips, straddling one of the seat supports. Larkwell and Nagel hurriedly followed suit. Crag cast a backward glance at the chronometer--a minute and ten seconds to go! He threw himself to one side of the hatch, squatted and hooked an arm into a panel console, hoping it was strong enough. He laid the bomb on the deck next to the hatch and reached up with his free hand, held his breath, hesitated, and jarred the last dog loose. The hatch exploded open. A giant claw seemed to grab his body, pulling him toward the opening. It passed as quickly as it came, leaving him weak, breathless. The bomb had been whisked into space. He got to his feet and grasped the hatch combing, looking out. It was a giddy, vertiginous moment. Before him yawned a great purple-black maw, a blacker purple than that seen through the view ports. It was studded with unbelievably brilliant stars agleam with the hard luster of diamonds--white diamonds and blue sapphires. _Something bright blinked in space._ He hesitated. The cold was already coming through his suit. He remembered he hadn't turned on either the heating element or interphone system. He drew the hatch shut and dogged it down, then switched both on. The others saw his movements and followed suit. "See anything?" Prochaska was the first to ask. His voice sounded tinny and far away. Crag adjusted his amplifier and said grimly: "It blew." "How ... how did it get here?" He identified the voice as Nagel's. He snapped brusquely, "That's what I'm going to find out." Larkwell was silent. Nagel began fiddling with the oxygen valves. They waited, quietly, each absorbed in his thoughts until Nagel indicated it was safe to remove their suits. Crag's thoughts raced while he shucked the heavy garments. It's past, he thought, but the saboteur's still here. Who? He flicked his eyes over the men. Who? That's what he had to find out--soon! When the suit was off, he hurriedly put through a call to Gotch, reporting what had happened. The Colonel listened without comment. When Crag finished, he was silent for a moment. Finally he replied: