“Now comes the UN,” Frank said. “At best.”

“Do you think we ought to…” Maya said. “Do you think we’re…”

“Safe in their hands?” Frank said acidly.

“Maybe we should take to the planes again.”

“In daylight?”

“Well, it might be better than staying here!” she retorted. “I don’t know about you, but I don’t want to just get lined up against a wall and shot!”

“If they’re UNOMA they won’t do that,” Sax said.

“You can’t be sure,” Maya said. “Everyone on Earth thinks we’re the ringleaders.”

“There aren’t any ringleaders!” Frank said.

“But they want there to be ringleaders,” Nadia said.

This stilled them.

Sax said mildly, “Someone may have decided things will be easier to control without us around.”

More news of impacts in the other hemisphere came in, and Sax settled down before the screens to follow it. Helplessly Ann stood over his right shoulder to observe it as well; these kinds of strikes had happened all the time back in the Noachian, and the chance to see one live was too much for her to pass up, even if it was the result of human agency.

While they watched, Maya continued to urge them to do something-to leave, to hide, whatever, just something. She swore at Sax and Ann both when they didn’t respond. Frank left to see what was happening at the spaceport. Nadia accompanied him to the door of the city offices, afraid that Maya was right, but unwilling to listen anymore. She said good-bye to Frank and stood before the city building, looking at the sky. It was afternoon, and the prevailing westerlies were beginning to sweep down the slope of Tharsis, bringing with them dust from the impacts; it looked like smoke in the sky, as if there were a forest fire on the other side of Tharsis. The light inside Cairo dimmed as the dust clouds obscured the sun, and the tent’s polarization created short rainbows and sundogs, as if the very fabric of the world were unravelling into kaleidscopic parts. Huddled masses, under a burning sky. Nadia shivered. A thicker cloud covered the sun like an eclipse. She went indoors, out of its shadow, back into the offices. Sax was saying, “Very likely to begin another global.”

“I hope it does,” Maya said. She was pacing back and forth like a great cat in a cage. “It will help us escape.”

“Escape where?” Sax asked.

Maya sucked air in through her teeth. “The planes are stocked. We could go back to the Hellespontus Montes, to the habitats there.”

“They’d see us.”

Frank came onto Sax’s screen; he was staring into his wristpad, and the image quivered. “I’m at the west gate with the mayor. There’s a bunch of rovers outside. We’ve locked all the gates because they won’t identify themselves. Apparently they’ve surrounded the city, and are trying to broach the physical plant from the outside. So everyone should get their walkers on, and be ready to go.”

“I told you we should have left!” Maya cried.

“We couldn’t have,” Sax said. “Anyway, our chances may be just as good in some sort of melee. If everyone makes a break for it at once, they might be overwhelmed by numbers. Now look, if anything happens, let’s all meet at the east gate, okay? You go ahead and go. Frank,” he said to the screen, “you should get over there too when you can. I’m going to try some things with the physical plant robots that should keep those people out until dark at least.”

It was now three PM, although it seemed like twilight, as the sky was thick with high, rapidly-moving dust clouds. The forces outside identified themselves as UNOMA police, and demanded to be let in. Frank and Cairo’s mayor asked them for authorization from UN Geneva, and declared a ban on all arms in the city. The forces outside made no reply.

At 4:30 alarms went off all over the city. The tent had been broached, apparently catstrophically, because a sudden wind whipped west through the streets, and pressure sirens went off in every building. The electricity went off; and just that quick it went from a town to a broken shell, full of running figures in walkers and helmets, all of them rushing about, crowding toward the gates, knocked down by gusts of wind or by each other. Windows popped out everywhere, the air was full of clear plastic shrapnel. Nadia, Maya, Ann and Simon and Yeli left the city building, and fought their way through crowds toward the east gate. There was a great crush of people around it because the lock was open, and some people were squeezing through; a deadly situation for anyone who fell underfoot, and if the lock were blocked in any way, it could turn deadly for everyone. And yet it all happened in silence, except for helmet intercoms and some background impacts. The first hundred were tuned to their old band, and over the static and exterior noises Frank’s voice came on. “I’m at the east gate now. Get out of the crush so I can find you.” His voice was low, businesslike. “Hurry up, there’s something happening outside the lock.”

They worked their way out of the crowd, and saw Frank just inside the wall, waving a hand overhead. “Come on,” the distant figure said in their ears. “Don’t be such sheep, there’s no reason to join the toothpaste when the tent’s lost its integrity, we can cut through anywhere we want. Let’s go straight for the planes.”

“I told you,” Maya began, but Frank cut her off: “Shut up, Maya, we couldn’t leave like this until something like this happened, remember?”

It was near sunset now, the sun pouring through a gap between Pavonis and the dust cloud, illuminating the clouds from below in a garish display of violent martian tones, casting a hellish light over the milling scene. And now figures in camoflaged uniforms were pouring in through rents in the tent. There were big spaceport shuttle buses parked outside, with more troops emerging from them.

Sax appeared out of an alley. “I don’t think we’ll be able to get to the planes,” he said.

A figure in walker and helmet appeared out of the murk. “Come on,” it said on their band. “Follow me.”

They stared at this stranger. “Who are you?” Frank demanded.

“Follow me!” The stranger was a small man, and behind his face place they could see a bright ferocious grin. Brown thin face. The man took off into an alley leading to the medina, and Maya was the first to follow. Helmeted people ran everywhere; those without helmets were sprawled on the ground, dead or dying. They could hear sirens through their helmets, very faint and attenuated, and there were soundlike vibrations underfoot, seismic booms of some kind; but other than that all the hectic activity occurred in silence, broken only by the sounds of their own breathing, and their voices in each other’s ears, “Where to?” “Sax are you there?” “He went down that one,” and so forth, a strangely intimate conversation, given the dusky chaos they ran through. Looking around Nadia almost kicked the body of a dead cat, lying in the streetgrass as if asleep.

The man they were following appeared to be humming a tune over their band, an absorbed little bum, bum, ba-dum-dum dum -Peter’s theme from Peter and the Wolf, perhaps. He knew the streets of Cairo well, making turns in medina’s tight warren without a moment’s pause for thought, and leading them to the city wall in less than ten minutes.

At the wall they peered through the warped tenting; outside in the murk, anonymous suited figures were running off alone or in groups of two or three, in a kind of Brownian dispersion onto the south Noctis rim. “Where’s Yeli?” Maya exclaimed suddenly.

No one knew.

Then Frank pointed. “Look!”

Down the road to the east, a number of rovers had appeared out of Noctis Labyrinthus. They were very fast cars of an unfamiliar shape, coming up out of the dusk without headlights.

“Who now?” Sax said. He turned to look at their guide for an answer; but the man was gone, disappeared back into the alleyways.