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People.

“What is on your docket for today?” Luisa asked.

“Looking at spreadsheets,” Ivy said. “Trying to figure out the consequences of losing Kourou.”

“That is one monkey wrench we didn’t need,” Doob said.

“To be sure,” Ivy said, “but in a weird way, I’m almost . . .” and she trailed off.

“Glad? Relieved?” Luisa guessed.

“It’s like the starting gun finally went off,” Ivy said. “We’ve been prepping for this for almost two years. Awaiting the disaster. Waiting for all hell to break loose. And now it has. Just not in the way we expected.”

“What were you expecting?” Luisa asked.

“That we’d get hit by a bolide and take a lot of casualties,” Ivy said. “Instead something unexpected happened. Which is good training, in a way.”

“How’s your sweetie?” Luisa asked.

Doob shut off his treadmill and unbuckled the padded belt that connected him to the bungee cords. He was the only man in a room where two women were talking about one of their boyfriends. He knew his cue to make himself scarce.

“He went dark on me two days ago,” Ivy said. “Which means he’s probably underwater.”

“I’m sure he’ll pop up for air soon,” Luisa said. “Can he send email when the submarine is submerged? I know nothing about it.”

“There are ways—” Ivy said, but by that time Doob was floating out of the module.

He made his way aft down the Stack to H2, then clambered down a spoke into the rotating torus T2, which Rhys Aitken had been sent up to build. Gravity in it was one-eighth of Earth-normal. Originally designed as a space hotel for tourists, it had never been quite up to the requirements placed on it by the Cloud Ark project, and so Rhys had been put in charge of building a larger one, concentric with T2, and inevitably called T3. Never one to rest on his laurels, he had invented a completely new system for building it. Unsurprisingly to Dinah, this had consisted of assembling a long loop of high-tech chain and setting it in motion around T2, then adding stuff onto it incrementally. It spun around the same hub at the same RPMs, but because it was bigger, its simulated gravity was a little stronger, about equal to that on the moon. It housed the closest thing the Cloud Ark had to a bridge: a segment of T3 about ten meters long, used by Markus as his headquarters. Attempts had been made to dignify it with names such as “command center,” but at the end of the day it was just an upgraded version of the Banana: a conference room with some television screens and power feeds for tablet computers.

Izzy didn’t have a helm. It didn’t have controls as such. No big wheel to turn for steering it through space, no throttle. Just a bewildering assortment of thrusters controlled through a web interface that could be pulled up on any tablet, provided you had the right password. So, the control room, the bridge, the command center could be anywhere. People had ended up calling the room Markus had chosen the Tank. Adjoining it on one side was a smaller office that served as Markus’s sanctum sanctorum. Next to the Tank on the other side was a larger room with a number of cubicles, bizarrely like a suburban office park, where people supporting Markus could sit and work. It had been called the Cube Farm for about ten minutes and was now simply called the Farm. Adjoining the Farm on the other side was a maze of cramped rooms where one could obtain food or use the toilet.

Doob had found that the Farm was frequently the least crowded place on Izzy, just because it didn’t occur to people to go there. The gravity was good for his bones and the availability of coffee and toilets were obvious pluses. So he tended to swing by a couple of times a day, get a beverage, see what was happening, and, if things were quiet, grab a vacant carrel and do some work.

He got there at about dot 2. The walls of the Farm, and of the adjoining Tank, were lined with projection screens, known in NASA-speak as Situational Awareness Monitors. They acted as windows onto various parts of the Cloud Ark and its environs. One was showing the Earth below them, another the cloud of debris that had been the moon, another the approach of a supply module from Cape Canaveral getting ready to dock, another the progress of a bolo coupling drill being conducted by some newly arrived Arkies several kilometers aft. Some just displayed statistics and bar charts. The biggest, at the far end of the Farm, was occupied mostly by a grainy video feed from some part of the Earth where it was dark. A label superimposed at the bottom identified it as KOUROU, FRENCH GUIANA. Once Doob had that information to work with, he could make out the general scene: a galaxy of lights from the thousands of boats that had joined the “People’s Justice Blockade,” and in the background the much more orderly precincts of the spaceport, where an Ariane stood on one pad and a Soyuz on the other, ready to launch, but still unable to do so because of the threat of those Stingers.

The silhouette of a military chopper passed between the camera and the lights of the launch complex.

This was a twenty-four-hour news network. The crawl running across the bottom of the screen was being updated every few minutes by the current BFR, or Bolide Fragmentation Rate, which had started out at zero on A+0 and been climbing ever since then; this was the number that, when it caromed through the bend in its exponential curve, would signal the onset of the White Sky. The networks had been tracking it obsessively. There was an app for it. A bar in Boston had begun offering end-of-the-world drink specials whenever the BFR broke through certain milestones, and the promotion had been copied widely.

Above the crawl was a smaller video inset showing an empty lectern in the White House Briefing Room. Apparently they were expecting some sort of announcement.

Doob sat in one of the carrels, spent a few minutes checking email, and then tried to get back to his main task, which was to write a memo about the distribution of metal-rich moon fragments, how they might be reached and exploited, and why that should be interesting to the management of the Cloud Ark. He was only a few sentences in, however, when movement on the big Situational Awareness Monitor caught his eye, and he looked up into the eyes of the president of the United States.

She was staring into the camera, or rather the teleprompter screen in front of the camera, and delivering some sort of terse announcement. She looked pissed off.

Pinned to her lapel was a loop of ribbon. All the important people had been wearing these for the last few weeks, and they had become popular among the hoi polloi as a gesture of solidarity with the mission of the Cloud Ark. Selecting the color scheme had consumed resources equivalent to the gross domestic product of a medium-sized country. They had settled on a thin red line down the center, symbolizing the bloodline of the human race, flanked by bands of white, symbolizing starlight, flanked by bands of green, symbolizing the ecosystem that would keep the Arkies alive, flanked by bands of blue, symbolizing water, and, finally, edged by bands of black, symbolizing space. The discussion had been as lively as the results were complicated. Black symbolized death to Westerners, white symbolized it to Chinese, and so on. This design offended everybody. It had gotten loose on the Internet as the “official” ribbon design even though the commission charged with designing it had become hopelessly deadlocked and was still evaluating twelve different candidate designs submitted by schoolchildren from around the globe. Factories in Bangladesh had been repurposed to hurl this stuff out by the linear kilometer, they had shown up in kiosks and souvenir shops from Times Square to Tiananmen Square, and the world’s leaders had bowed to the verdict and begun wearing them. The president had attached hers using a lapel pin consisting of a simple disk of turquoise rimmed in platinum. The blue disk on the white field was meant to echo Crater Lake amid the snows of November; it was a visual emblem of the Crater Lake Accord, and the closest thing that the Cloud Ark had to a flag.