Red Mars (69 page)

Tent towns were simpler still. Most of them had been punctured by Phobos-based lasers; some had had their physical plants targeted by guided cruise missiles; others had been invaded by troops of one kind or another, their spaceports seized, armored rovers crashing through city walls, and in rare cases rocketpack paratroopers descending from above.

Nadia watched the jiggling video images that so clearly revealed the fear of the camera operators, her stomach collapsing to a tight walnut inside her. “What are they doing, testing methods?” she cried.

“I doubt it,” said Yeli Zudov. “It’s probably just a matter of different groups using different methods. Some look like they’re trying to do as little damage as possible, others seem to want to kill as many of us as they can. Make more room for emigration.”

Nadia turned away, sickened. She got up and took off for the kitchen, bent slightly over her collapsed stomach, desperate to do something. In the kitchen they had turned on a generator and were microwaving frozen dinners. She helped hand them out, moving up and down a line of people sitting in the hall outside. Unwashed faces, splashed with black frostnip blisters: some people talked animatedly, others sat like statues, or slept leaning against each other. Most of them had been residents of Lasswitz, but a good number had driven in from tents or hideouts that had been destroyed from space, or attacked by ground forces. “Is stupid,” an old Arab woman was saying to a gnarled little man. “My parents were Red Crescent in Baghdad when the Americans bombed it, if they have the sky is nothing you can do, nothing! We have to surrender. Surrender as soon as possible!”

“But to whom?” the little man asked wearily. “And for whom? And how?”

“To anyone, from everybody, and by radio, of course!” The woman glared at Nadia, who shrugged.

Then her wristpad beeped, and Sasha Yefremov babbled in a tinny wristphone voice. The water station north of town had gone up in an explosion, and the well it had capped was now fountaining in an artesian eruption of water and ice.

“I’ll be right there,” Nadia said, shocked. The town’s water station tapped the lower end of the Lasswitz aquifer, which was a big one. If any significant part of the aquifer broached the surface, the water station and the town and the entire canyon they lay in would disappear in a catastrophic flood— and worse, Burroughs was located only 200 kilometers down the slope of Syrtis and Isidis, and the flood could very conceivably run that far. Burroughs! Its population was far too large to evacuate, especially now that it had become a refuge for people escaping the war; there was simply no other place to go.

“Surrender!” the Arab woman insisted from the hall. “All surrender!”

“I don’t think that will work anymore,” Nadia said, and ran for the building’s lock.

A part of her was immensely relieved to be able to do something, to stop huddling in a building watching disasters on TV, and do
something
. And Nadia had platted and overseen the construction of Lasswitz, only six years before, so now she had an idea what to do. The town was a Nicosia-class tent, with the farm and physical plant in separate structures, and the water station well off to the north. All the structures were down on the floor of a big east-west rift called Arena Canyon, the walls of which were nearly vertical and half a kilometer high. The water station was located only a couple hundred meters from the canyon’s north wall, which in that area had an impressive overhang at the top. As Nadia drove with Sasha and Yeli to the water station, she quickly outlined her plan: “I think we can bring down the cliff onto the station, and if we can, the landslide ought to be enough to cap the leak.”

“Won’t the flood just carry the landslide’s rock away?” Sasha asked.

“It will if it’s a full aquifer outbreak, sure. But if we cover it when it’s still just an uncapped well, then the escaping water will freeze in the landslide, and hopefully form a dam heavy enough to hold it. Hydrostatic pressure in this aquifer is only a bit greater than the lithostatic pressure of the rock over it, so the artesian flow isn’t all that high. If it were we’d be dead already.”

She braked the rover. Out the windshield they could see the remains of the water station, under a cloud of thin frost steam. A rover came bouncing full speed toward them, and Nadia flashed their headlights and turned the radio to the common band. It was the water-station crew, a couple named Angela and Sam, rabid with the adventures of the last hour. When they had driven alongside and finished their story, Nadia explained to them what she had in mind. “It could work,” Angela said. “Certainly nothing else will stop it now, it’s really pumping.”

“We’ll have to hurry,” Sam said. “It’s eating the rock at an unbelievable rate.”

“If we don’t cap it,” Angela said with a certain morbid enthusiasm, “it’ll look like when the Atlantic first broke through the Straits of Gibraltar and flooded the Mediterranean basin. That was a waterfall that lasted ten thousand years.”

“I never heard of that one,” Nadia said. “Come on with us to the cliff and help us get the robots going.”

During the ride over she had directed all the town’s construction robots from their hangar to the foot of the north wall, next to the water station; when the two rovers got there, they found a few of the faster robots had already arrived, and the rest were grinding over the canyon floor toward them. There was a small talus slope at the foot of the cliff, which towered over them like an enormous frozen wave, gleaming in the noon light. Nadia linked into the earthmovers and bulldozers and gave them instructions to clear paths through the talus; when that was done, tunnelers would bore straight into the cliff. “See,” Nadia said, pointing at an areological map of the canyon that she had called onto the rover’s screen, “there’s a big fault there behind that whole overhanging piece. It’s causing the lip of the wall to slump a bit— see that slightly lower shelf at the top? If we set off all the explosives we’ve got at the bottom of that fault, it’s sure to bring down the overhang, don’t you think?”

“I don’t know,” Yeli said. “It’s worth a try.”

The slower robots arrived, bringing an array of explosives left over from the excavation of the town’s foundation. Nadia went to work programming the vehicles to tunnel into the bottom of the cliff, and for most of an hour she was lost to the world. When she was finished she said, “Let’s get back to town and get everyone evacuated. I can’t be sure how much of the cliff might come down, and we don’t want to bury everyone. We’ve got four hours.”

“Jesus, Nadia!”

“Four hours.” She typed in the last command and started up their rover. Angela and Sam followed with a cheer.

“You don’t seem very sorry to leave,” Yeli said to them.

“Hell, it was boring!” Angela said.

“I don’t think that’s going to be much of a problem anymore.”

The evacuation was difficult. A lot of the town’s occupants didn’t want to leave, and there was barely room for them in the rovers at hand. Finally they were all stuffed into one vehicle or another, and off on the transponder road to Burroughs. Lasswitz was empty. Nadia spent an hour trying to contact Phyllis by satellite phone, but the comm channels were disrupted by what sounded like a number of different jamming efforts. Nadia left a message on the satellite itself: “We’re noncombatants in Syrtis Major, trying to stop the Lasswitz aquifer from flooding Burroughs. So leave us alone!” A surrender of sorts.

Nadia and Sasha and Yeli were joined in their rover by Angela and Sam, and they drove up the steep switchbacks of the cliff road, onto the south rim of Arena Canyon. Across from them was the imposing north wall; below to the left lay the town, looking almost normal; but to the right it was clear something was wrong. The water station was broken in the middle by a thick white geyser, which plumed like a broken fire hydrant, and then fell into a jumble of dirty red-white ice blocks. This weird mass shifted even as they watched, briefly exposing black flowing water which frost-steamed madly, white mists pouring out of the black cracks and then whipping down-canyon on the wind. The rock and fines of the Martian surface were so dehydrated that when water splashed onto them they seemed to explode in violent chemical reactions, so when the water ran over dry ground, great clouds of dust fired off into the air and joined the frost steam swirling off the water.

“Sax will be pleased,” Nadia said grimly.

At the appointed hour, four plumes of smoke shot out of the base of the northern wall. For several seconds nothing else happened, and the observers groaned. Then the cliff face jerked, and the rock of the overhang slipped down, slowly and majestically. Thick clouds of smoke shot up from the bottom of the cliff, and then sheets of ejecta shot out, like water from under a calving iceberg. A low roar shook their rover, and Nadia cautiously backed it away from the south rim. Just before a massive cloud of dust cut off their view, they saw the water station covered by the swift tumbling edge of the landslide.

Angela and Sam had been cheering. “How will we tell if it’s worked?” Sasha asked.

“Wait till we can see it again,” Nadia said. “Hopefully the flood downstream will have gone white. No more open water, no more movement.”

Sasha nodded. They sat looking down into the ancient canyon, waiting. Nadia’s mind was mostly blank; the thoughts that did occur to her were bleak. She needed more action like the last few hours’, the kind of intense activity that gave her no time to think; even a moment’s pause and the whole miserable situation crashed back in on her, the wrecked cities, the dead everywhere, Arkady’s disappearance. And no one in control, apparently. No plan to any of it. Police troops were wrecking towns to stop the rebellion, and rebels were wrecking towns to keep the rebellion alive. It would end with everything destroyed, her whole life’s work blown up before her eyes; and for no reason! No reason at all.

She couldn’t afford to think. Down there a landslide had overrun a water station, hopefully, and the water rushing up the well had been blocked and frozen, making a composite dam. After that it was hard to say. If the hydrostatic pressure in the aquifer was high enough, a new breakout might be forced. But if the dam were thick enough. . . Well, nothing to be done about it. Although if they could create some kind of escape valve, to take the pressure off the landslide dam . . .

Slowly the wind tattered the dust away. Her companions cheered; the water station was gone, covered by a fresh black landslide that spilled out from the northern wall, which now had a big new arc in its rim. But it had been a close thing, not anywhere near as big a landslide as she would have hoped. Lasswitz itself was still there, and it appeared that the layer of rock over the water station was not all that thick. The flood seemed to have stopped, it was true; it was motionless, a chunky, dirty white swath, like a glacier running down the middle of the canyon. And there was very little frost steam rising from it. Still . . .

“Let’s go back down to Lasswitz and look at the aquifer monitors,” Nadia said.

They drove back down the canyon-wall road and into Lasswitz’s garage. They walked down the empty streets in walkers and helmets. The aquifer study center was located next to the city offices. It was odd to see their refuge of the last few days empty.

Inside the aquifer center they studied the readouts from the array of underground sensors. A lot of them were no longer functioning, but those that were showed that hydrostatic pressure inside the aquifer was higher than ever before, and increasing. As if to emphasize the point a small temblor shook the ground, vibrating the soles of their boots. None of them had ever felt such a thing on Mars before. “Shit!” Yeli said, “it’s going to blow again for sure!”

“We have to drill a runoff well,” Nadia said. “A kind of pressure valve.”

“But what if it breaks out like the main one?” Sasha asked.

“If we put it at the upper end of the aquifer, or midway so that it takes some flow, it should be fine. Just as good as the old water station, which someone probably blew up, or else it would still be working fine.” She shook her head bitterly. “We have to risk it. If it works, it works. If it doesn’t, then maybe we cause an outbreak. But if we don’t do something, it looks like there’ll be an outbreak anyway.”

She led the little group down the main street to the robot warehouse in the garage, and sat down in the command center to begin programming again. A standard drilling operation, with maximum blowout baffling. The water would come to the surface under artesian pressure, and then they would direct it into a pipeline, which they would instruct a robot crew to lay in some direction that would take it out of the Arena Canyon region. She and the others studied topographic maps, and ran simulated floods down several canyons paralleling Arena to north and south. They found that the watershed was huge, everything on Syrtis drained down toward Burroughs, the land was a big bowl here. They would have to pipe the water north for nearly 300 kilometers to get it into the next watershed. “Look,” Yeli said, “released into the Nili Fossae, it will run straight north onto Utopia Planitia, and freeze on the northern dunes.”

“Sax must be
loving
this revolution,” Nadia said again. “He’s getting stuff they
never
would have approved.”

“But a lot of his projects must be getting wrecked too,” Yeli pointed out.

“I bet it’s still a net gain, in Sax’s terms. All this water on the surface . . .”

“We’ll have to ask him.”

“If we ever see him again.”

Yeli was silent. Then he said, “Is it that much water, really?”

“It’s not just Lasswitz,” Sam said. “I saw a news bit a while ago— they’ve broken the Lowell aquifer, a big breakout like the ones that cut the outflow channels. It’ll rip billions of kilos of regolith downslope, and I don’t know how much water. It’s unbelievable.”

“But
why?
” Nadia said.

“It’s the best weapon they have, I guess.”

“Not much of a weapon! They can’t aim it or stop it!”

“No. But neither can anyone else. And think about it— all the towns downslope from Lowell are gone— Franklin, Drexler, Osaka, Galileo, I imagine even Silverton. And all those were transnational towns. A lot of channel mining towns are vulnerable, I should think.”