intruder had magnetic boots. He began walking after Bobbie. Bing looked at the window and yelled, “Air leak! Everyone into survival bubbles!” She hastily zipped her own closed. Over a dozen shots had hit the transparent aluminum viewport. Cracks in its crystalline structure spread as Billy watched. He looked around the hold. Most of the passengers had gotten to the ladder or rescue bubbles. Bobbie’s two friends had been knocked off their grips in the scuffle and were drifting through the air. He leapt for the nearest, grabbed her by the waist, and threw her toward the girls’ sleeping tent. A quick rebound off the deck let him grab the other girl. Their momentum took them toward the professor’s observation gear. He kicked off it to get them to the tent. In a moment all three were in it as he turned to seal the entrance. Thank God for vacuum-proof zippers, he thought. He had it closed just as the window gave way in a roar of escaping air. The tent’s air pressure pulled its walls tight. A sharp whistle came from the entry. “Fuck.” A quick inspection showed Billy some bent teeth were letting air through the zipper. He slapped his palm on the leak. The whistle stopped. No sound except the girls crying in fear. “Only one leak, that’s easy. Got any water?” One held up an empty bottle. “Crap.” The suction on his hand hurt. He pulled his hand off and yanked his fly open. A stream of urine splashed messily around the leak. Some was on target. Most bubbled away. Enough froze to seal the leak with an irregular block of ice. Quiet fell again. “Um, sorry,” Billy said over his shoulder as he refastened. “Only idea I came up with.” The brown-haired girl muttered, “I thought boys thinking with it was an expression .”
***
The cabins by the hatch to the hold were both empty. Captain Schwartzenberger waited in the starboard one, feet and shoulders braced in a corner. He aimed his pistol at the latch side of the cabin hatch. He heard the deck hatch unbolt. A great whoosh as corridor air escaped into the hold. Then the hatch rebolting. A few magnetic footsteps. A creak as the other cabin’s hatch opened. The captain pulled his hatch open and braced himself on the rim. The intruder held a mirror to peer around the hatch into the right-hand cabin. Schwartzenberger fired half a dozen shots into the back of his head. The lead bullets blasted the dark grey paint off the gleaming armor of the helmet. The intruder back-kicked the captain off his perch, sending him spinning into the middle of the cabin. A marksmanship instructor’s mocking voice echoed in his head. “ Always aim for the center of mass.” Schwartzenberger tried a couple of shots as he spun. Neither came close. He landed well on the far wall but the intruder had followed too closely for him to get a shot off. The captain blocked a punch to his face but an arm bone broke under the suited fist. A kick to the knee was even more painful. The intruder dodged a left-hand punch then slammed his hand into the side of Schwartzenberger’s head. Blackness.
***
Bobbie and John waited in the captain’s cabin, feet braced on his bed. She was amazed at how cheerful she felt. It must be the familiarity of it. John ran her through a hide and ambush drill at least twice a month. If she could hit the pop-up target before he put three holes in it there’d be ice cream. Lately he’d been threatening to change it to two holes. She almost fired as the hatch opened. Nothing was visible in the gap. Then some fingers grabbed the edge, a mirror mounted to their back. Bobbie’s shot missed. John missed the fingers but shattered the mirror. They vanished, then flicked back into view as they threw something into the cabin. Bobbie couldn’t see what it was, just John’s back as he sprang to intercept. He grabbed, cocked his arm to throw, the grenade went off. His body went limply across the cabin. The concussion shook Bobbie but she had drilled