bank, bouncing light among the droplets, it was an aquarium tank letting photons go straight through. When fractured it split along the planes of the crystal. The edges produced were single lines of aluminum atoms. TAl instruments were widely used in surgery. The intruder groped for a hold on Mitchie’s arm while she steered him onto one of the window shards. The arms flung wide as the tip pierced the propellant tank on his back. Mitchie kept her thrusters on until the tip came through the intruder’s chest and punctured her suit. She stopped thrust and kicked away from the ship. A red circle appeared on the crazed-white faceplate. Another overlapped it a few seconds later. Mitchie looked down at her belt pouch. Her hands shook too much to get it open. She pushed her left hand onto her chest, quieting but not eliminating the hiss of escaping air. The other finally got the pouch open. She bounced off the chasm wall. Her right hand pulled the sealant tube out. Trying to take the cap off without releasing the pressure on the leak sent the tube spinning off. Catching it took both hands. She panted frantically trying to fill her lungs from the thinning air. First glob of sealant bounced off the suit. Second was in place. She smeared it flat. Blessed silence. Another squeeze of sealant to thicken it. Air still felt thin. She twisted the oxygen valve. A cold breeze blew on her cheek. Mitchie took deep breaths, feeling her pulse slow. The intruder’s faceplate was solid red. His limbs swayed limply. Mitchie looked away, scanning the chasm for Bobbie’s bubble. She headed up the wall, waving her flashlight about in hopes of seeing a reflection.
***
The hold was calm now. Bing had used a pair of magnets to roll her bubble over to the suit locker. She could pop her bubble, open the locker, grab out her suit, slide it on, and seal it up in . . . about sixty seconds. Which is about how long it would take to pass out from hypoxia. And assuming that a full body case of vacbite wouldn’t slow her down. So she just waited, rehearsing how to do it without any missed steps, hoping someone else would come along in a suit before her bubble’s air ran low. Professor Tsugawa was in his pressure tent. He also had a bubble with him so he had plenty of air available. He kept worrying about his data. The observatory was vacuum-rated but he had no idea how well it stood up to the explosion. One of those gunshots would have completely destroyed it. He couldn’t see it from the window of his tent. Without that data this whole trip would have been a waste. Part of him felt guilty that he wasn’t worried about the lives at risk from the violence. But he was just an innocent bystander and no one else was going to worry about the data. Billy’s improvised leak seal still held tight. Other things in the big tent were less stable. “I know that, and you know that, but the captain said you’re underage, so the age on this ship is higher than that! Stay at your damn end of the tent.” Bing had twisted her bubble around until she could look over the rest of the hold. The intruder looked very dead on that spike. She wondered how that’d happened. Two tents were occupied and a couple of rescue bubbles floated loose in the hold. She’d seen all three grad students donning bubbles when the blow-out happened. Hopefully the third was safe in the chasm. She suppressed a vision of a bubble drifting against a window shard and being blown about by air escaping from the cut. “Mitchie to Fives Full . Anyone there?” Bing grasped her handcomm. “Bing here. How are you? Where are you?” “I’m outside. No injuries.” If you don’t count some vacbite to the chest . “I have Bobbie, she’s unconscious.” “Good. Someone took out the intruder. I don’t know what’s up with Mussa.” Guo broke in. “I took Musha out. Lower deck is shafe now.” “You’re alive!” cried Bing. “You sound like hell.” “Jusht woozy,”