"The Atlantic Federation has never disputed that the sky broke. We dispute only the theology that followed. When an arch collapses, one examines the keystone, not the sermon."
From Julian Ashford, private memorandum to the Pan-American Defense Council, 2128
Nine days into the eighty-two, the Federation came to Tianmen to look at the hull.
watched them cross the floor of Hangar Two with the sun going down behind them through the open doors. The hangar had been cut into the Tianmen headland for a programme that died before it flew, and the 712 lay inside it the way it had lain for thirty-four years: two hundred metres of airframe under grey dust sheets, which Bo Han and had dragged back from the engine housings and nowhere else. Where the sheets were off, the mounts were empty. There were six round holes, each big enough to stand up in, waiting for engines that were sitting in a naval yard in Norfolk, Virginia. Unless these visitors agreed to send them, the 712 would never leave the ground.
walked ten metres ahead of her own delegation and did not slow down for it. She carried a flight helmet by its chin strap, and the wind off the sea pushed her coat out behind her. She was forty-six, with ash-blonde hair cropped hard at the sides, pale grey eyes, and a white seam of scar under the chin. Her left shoulder rode two centimetres lower than the right. had read why in her file, a harness accident in 2112, and he had read the last line of the file too: she had asked to be left off the list for this.
Far behind her, at the foot of the forward landing strut, leaned against the hydraulic sleeve with his ankles crossed and an unlit cigarette turning in his fingers. He caught 's eye down the length of the hangar and smiled faintly.
Voss stopped two metres short of and looked past him at the hull.
"So that's the 712."
"That's the 712."
"I sat in a mock-up of her cockpit in 2109. Federation frame, Coalition drive, Accord lungs. We called her the camel." She turned the pale eyes on him. "The Eastern Coalition calls this an act of scientific solidarity. The Atlantic Federation calls it handing high-energy propulsion blocks to an administration that still cannot explain why forty square kilometres of Jiangbei folded like wet pasteboard."
"Jiangbei folded at six in the evening on the fifth of April," said. "We said so seventeen days before it did. The four hundred and twelve thousand people who lived there were somewhere else."
"I've seen the footage. Everybody's seen the footage. You on a deck chair." She let the helmet swing. "The Prometheus-Four cores were machined at Norfolk. They don't cross three oceans to join an expedition built on the field notes of a man who spent five years writing apologies to McGill."
Behind , had not moved. He could feel her not moving.
"Captain Osei told me once that the Norfolk yards were built by men who treated gravity like an enemy to be beaten with leverage," said.
The hangar was big enough that the sound of the sea came in a second late off the back wall. Voss's face went still.
"Don't quote Kwesi to me."
"He kept a brass plumb-bob taped to his console," said. "He told Karim it was the only instrument on the ship that didn't lie about which way down was. When the Halo took hold of us, Karim was fighting a drift that none of our instruments could see. Kwesi reached across, cut the feed breakers on Karim's board, and told him to stop fighting the curl. A minute later he let a twenty-three-year-old tell him where to burn. You knew him. He would not have left forty tons of engine in a shed in Virginia because of who drew the map."
"Kwesi died," Voss said, without raising her voice, "in an Accord tin can, because the navigation suite didn't know what it was looking at. I stood on the dock at Norfolk while they refitted her. I signed off her navigation gear myself." She looked up at the empty engine mounts. "And now you want me to put seven people and three of my reactor blocks into the same hole."
had nothing to say to that, so he said nothing.
The answer came from the hangar door. crossed the concrete with a leather slate under her arm, her heels loud, the jade pin in her chignon catching the last of the sun. came a step behind her with a field tablet, coat open, talking into an earpiece and then not.
Two of Voss's officers moved to stop them. They stopped themselves when Voss lifted a hand.
"," Ji-won said. "Forgive the interruption. Ms. Whitlock is accredited to this site as an observer under the Geneva data accords. She has something you will be asked about tonight."
held out the tablet. Voss did not take it, so turned it around and held it up.
"Two hours ago this hit the morning wires in Boston and Geneva," said. "Anonymous drop. It's an internal order from Boundary Operations Command, Longwan, for containment rings cut to fit the mouth of the Sky Gate. It's dated six weeks before the Gate opened." She scrolled. "And there's a covering memo. It says the Coalition opened the Gate on purpose with a captured Federation weapon, so that your government would be shamed into handing over its engines for an emergency mission."
A grey-haired colonel in the delegation, Miller by his tag, had his sleeve terminal up already. "We received the alert at the gate. It's on every Federation channel."
"Of course it is." had come up the hangar without anyone seeing him come. He stood at the edge of the group with the cigarette still turning. "It was timed for the morning papers in Boston, so the Senate wakes up to it. The third paragraph is very good State Council prose. Somebody worked hard on it." He nodded at Ji-won with real courtesy. "Do let the Counsellor speak, Mara. She has already found the clock error we were supposed to miss."
Voss did not look at him. She looked at . "Is that the story you're denying, Colonel?"
"I don't deny nursery rhymes," said. "I investigate signatures."
Ji-won set her slate on an engine dolly and opened it. A web of security checks spread across the screen, amber and red, all pointing at one small block of hidden data inside the file.
"Here is what is known," she said. "The template is our Third Bureau's 2124 form. The seal is correct. The signing key belongs to the Jiangbei Reconstruction Office. All of that can be bought. What cannot be bought is the clock." She touched a line. "The clock inside this file runs four hundred milliseconds fast."
"Longwan runs slow," said. "Since the Stadium Hive."
"Every terminal within twelve kilometres of the estuary, civil and military, has run four hundred milliseconds slow since the night the Hive opened. It is in every court filing I have signed this year. My own warrants carry it." Ji-won closed the display. "So this document was written on a clock that never felt the Hive. The network trail places it in Singapore. The fee for that network came from an account the Meridian Circle used to rent the barges for the Lantern Festival. That is also known. Who sat at the keyboard is not known. We have the channel. We do not have the people."
"The cultists," Voss said.
"I'm filing at nine," said. "Coalition prosecutor on the record. Two Federation timing labs I've already called who'll say the same thing about the drift, because it's their own published data. Colonel Miller, do you want to be quoted?"
Miller had stopped tapping his sleeve. "It's a clean forgery. That still doesn't prove the Coalition didn't test something at the Gate."
had not looked at the delegation once. She turned her head to him now.
"You are afraid," she said. "It is a reasonable posture. We are all afraid. But do not use an amateur's counterfeit to excuse your government's paralysis."
Miller opened his mouth. Voss lifted two fingers without looking round, and he closed it.
For a while Voss studied the empty mounts again. When she turned back to , the hostility had gone out of her face, and what was left was worse: a pilot's tiredness, the look of someone who has buried people for being wrong about a number.
"Your committee paper says we don't need to fly the usual route," she said. "That we drop into some flat channel in space and it carries us." She shifted the helmet to her other hand. "Who worked that out? You? Between lectures?"
"I built the model," said. "A twenty-four-year-old orphan from the launch academy made it fly."
He looked up. Everyone looked up.
was eleven metres above them on the scaffold that wrapped the 712's flank, one hand on a pole, a red ribbon in her hair, an orange binder under her arm. She had obviously been there the whole time. When she saw that the whole Federation delegation was looking at her, she went red from the collar to the hairline and started down the ladder too fast, and arrived at the bottom with her heels together and her chin up.
"," she said. ", flight dynamics. Your standard approach is wrong."
Somebody in the delegation laughed once. Voss didn't.
"Go on."
"The Federation plan is a full burn close to the Moon and then a coast through the debris. But the debris isn't drifting freely. It's caught in a wave that stands still in space, and if your engines are lit when you enter the wave, the exhaust folds back into them." Her free hand was moving, drawing the wave in the air, and she did not notice it. "So you cut the mains forty seconds early and let the gradient carry the ship, the way a slope carries a sled. The way in looks rough. We call it a triple-node shear: three narrow waists, and at each waist space is perfectly flat. Enter at the right angle and the hull never feels the strain at all. It goes through like a pebble down a dry well."
"That's theory," Voss said.
"It's the Gaston." Su's voice cracked on the name and she pushed through it. "Your survey ship. 2122. Its hull strain logs were in the Federation's open archive. We ran them against Dr. Neumann's numbers in the simulator downstairs. They match to four decimal places."
Voss looked at her for a long time. Then she handed her helmet to the nearest of her officers.
"Show me."
The simulator hung in a pit cut six levels down into the headland: a steel sphere inside three spinning rings, the whole thing big enough to throw a bus. If Su's approach failed in here, the Federation would go home with its engines. was at the control rack with a wrench in her breast pocket and a cable tie holding her hair. She gave a nod and the Federation delegation a long look, the kind she gave to subcontracted welds.
Su went up the gantry ahead of everyone and through the start-up checks by touch. She had stopped blushing. Down here she moved like someone in her own kitchen.
"The capsule's set for two," she said. "Throttle is on the right. Steering and the map are on the left. The displays are in Accord notation, I'm sorry, there wasn't time to change them."
Voss had stripped off her coat. Under it her flight shirt pulled tight over a ceramic plate bonded to her left ribs. She put one hand on the hatch rung. "You fly left?"
"I don't fly," Su said. "I have no orbital hours. I plan the flights from the ground."
"You planned a flight out to four hundred thousand kilometres, and you've never been above fifteen thousand metres?"
"The Coalition does not allocate launch mass to orphans without family credit." Su said it flatly, as a fact she had checked many times. "I know the maths. The sky does not care who paid for the propellant."
Voss held her eyes for five seconds.
"Get in the left seat," she said. "If the model snaps, you can watch your own numbers fail first."
went up to the observation rail with and . Below them the locking collars drove home one after another, four flat pneumatic blows, and the rams lifted the sphere clear of its cradle. had found a place at the far end of the rail, by himself.
"She's testing her," said.
"She is testing the Accord," said. "If the maths is 's and the pilot is Coalition, the Federation is a passenger. Mara Voss does not like being cargo."
"Loading the Gaston data," called from the rack. "Rupture strength six. Spinning up."
The machine began to turn. For half a minute it was only weight and noise, a deep grinding from the bearings that came up through the rail into 's hands. Then the outer ring kicked the sphere thirty degrees on its axis, and the overhead speaker gave them Su's voice, fast and level.
"Entering the first rough zone. Drift is pulling us three degrees to port. Do not correct, ."
's grip tightened on the rail. Eight years ago a pilot had wanted to correct, and the only answer had had for him was that closer was not a useful word anymore. He had not known then how to say it better. Su had found a way.
"The engine bell is overheating," Voss said. Her breathing was loud on the channel. "Six hundred degrees on the starboard side."
"Let it heat. The gauges are reading the bend in space. It isn't real heat. If you vent now you lose the helium blanket. Wait for the node, . Wait for the first flat waist."
On the screen beside the Stability Index was falling, and nothing about watching it fall was easy. Point eight two. Point six five. Point four one. On Earth, at point four, Unit Nine cleared streets.
"The first waist is eighty kilometres ahead," said into the technician's mic. "Wanxing, watch the sideways drift."
"I see it. , kill the engines."
Nothing happened. The machine was screaming now, the inner rings fighting one another to give the people inside the feeling of a space that would not stay flat. On the map the green line of the ship drove on toward the waist with its engines still burning.
understood the pause. A pilot who has flown for twenty-five years does not switch off her engines in the middle of a storm because a girl tells her to. He did not know what to say to change that. did.
"Voss," said into the command circuit. "Cut the fuel."
A heavy thud came through the pit as the fuel valves slammed shut. The sphere did not slow. It swung wider, the arms going out flat, the shadows of the struts wheeling across the rock.
"We're tumbling." Voss forced the words through her teeth under four gravities. "Nose is fifty degrees off. We're going to clip the southern horn."
"We're not tumbling." Su's voice was small and crushed and perfectly clear. "Look at the plumb-bob, . The needle isn't moving."
looked at the screen. In the corner of the steering display was a single white needle that showed which way was down. Federation pilots had called it the plumb-bob since before Voss was born. Everything else on the screen was spinning. The needle was still.
Then the red scatter on the map collapsed. It happened all at once, the way water freezes in a cold glass when you tap it. The tangle of arrows lay down into parallel gold rails, and the little ship, with no engines and no hand on the controls, slid between them.
The Stability Index blinked, turned white, and read 0.00.
It held there, and nothing tore. The ship sat at the bottom of the zero the way a stone sits on a riverbed, and then the slope lifted it out the far side, into clean vacuum past the rim, and the rings began to wind down.
"Exit," said. She checked a number twice. "Fuel remaining is twelve percent above the best Federation flight plan on file."
For ten seconds the only sound in the pit was the fans on the transformer banks.
The hatch hissed open. Su came down the ladder first. Her knees went on the second rung from the bottom and she caught herself by both hands and hung there by her wrists for a second, boots scrabbling, until her heels found the concrete. Her face was white and shining. The ribbon had come undone in the harness and lay over her collarbone. Her chin stayed up.
Voss came out after her. She picked up her coat, snapped the dust off it, and put it over her shoulders without using the sleeves. Then she walked across the floor of the pit to the foot of the observation stair, where had come down to meet her.
"You knew Kwesi would have done that," she said.
"Kwesi was an engineer," said. "He thought if the universe was broken, it was broken according to a pattern. He didn't have anything to see the pattern with."
Voss turned to look at Su, who was standing against the control rack with her hands jammed in her jacket pockets to stop them shaking.
"You're twenty-four?"
"Twenty-four and eight months, ."
"You ever pulled five g's in an actual vacuum?"
"No, ."
"You will." Voss looked past to . "Tell your provincial council to clear the rail docks at Ningbo. The cores come in by sea and go down by rail. Three hundred tonnes of them. If anyone drops one off a flatbed, I will shoot the crane driver myself."
"The docks are cleared," said. " Gu has two platoons on the harbour."
Voss raised an eyebrow at that, at the fact that the docks had been cleared before she had agreed to anything, and let it go. She turned to , who was typing with one thumb against her hip. "You writing this down, Whitlock?"
"Every word, Mara." didn't look up. "Joint crew. One Accord theorist who cannot keep his shoes dry, one Warborn commander with an unregistered lineage, one Coalition launch orphan with a grudge against gravity, and you."
"And me," Voss said.
She reached into her breast pocket, took out something small, and set it on the rail beside 's hand. It was a scuffed steel cylinder the size of a chess piece, its serial number worn away. He knew what it was before he picked it up: a fuse from the shock damper of an ERV escape module. He had sat on top of the twin of this one for twenty-two days.
"Kwesi gave me that at Norfolk, the week they finished the refit," Voss said. "He said if we ever reached the Moon and found out God was just bad arithmetic, I should use it to hold down the logbook."
put it back in her palm. She closed her hand on it.
"The model works, Dr. Neumann," she said. "Now we find out what is waiting at the other end of the zero."
She went up the stair with her coat over her shoulders and her officers falling in behind her, Miller last.
had not followed his delegation. When came up to the rail again to collect his notes, the envoy was still at the far end of it, forearms on the bar, looking down into the pit where the rings hung locked under the lights.
"She will give you the engines," said. "Mara is an honest soldier. She believes in hardware, fuel weight and dead friends. Give her numbers that do not lie, and she will sign away Norfolk's best cores because her own code leaves her no other choice."
"And yours?"
"I'm a diplomat, Doctor. If I had a code, they would have pensioned me off to a climate archive in Halifax years ago." He turned the cigarette over. Up close, without his audience, he looked tired. "I told you once, in Ottawa, that you would need someone who owns faster ships. I didn't say I would be the one who handed them over."
"You took Miller apart upstairs."
"Miller is clumsy, and I have a deep dislike of clumsy lies." looked down into the pit. "My steering committee in Boston gave me explicit orders to kill this flight. If the East reaches the Halo first, they tell me, the next century belongs to Longwan. If the launch ends in fire, an Accord theorist makes very convenient kindling for a total embargo. Either way, they would prefer the ship stayed under its sheets."
"Then why tell me?"
"Because you will find out, and I would rather you found out from me." He straightened. "Don't take my competence for loyalty to your arithmetic, Doctor. I do not yet know whose side I am on. Boston wants a wall. Longwan wants an empire of survivors. The Circle wants to drown us all in holy geometry. And you want everyone to walk into the mouth of the thing that broke the Moon, because you think understanding cures fear."
thought about it.
"Nothing cures fear," he said. "It's just the only work that leaves anyone alive."
smiled, thin and not unkind, and put the cigarette back in his pocket unlit.
"Until Ningbo, Dr. Neumann."