"We estimate three weeks maximum for a sufficient quantity of the vaccine to be produced. And with the correct procedures, nobody who has contracted the disease will die. However, that will require complete cooperation from your authorities. Are you going to assist with that? Or do you want your people to suffer needlessly?"

"Is that why you introduced this, to help subdue us?"

"It was not introduced by us," Simon ground out. "The tuberculosis bacilli have a long history of evolving new and unpleasant variants. Nobody knows where this particular one has evolved. Only a fool or a politician would seek to blame us for this." His personal AS informed him the president was receiving a stream of files from the datapool, all encrypted. Updating him on tuberculosis, no doubt "Oh yeah," Edgar Strauss said. "You and it arriving together is just a complete coincidence. What kind of screening procedures does Zantiu-Braun use on its strategic security personnel before departure? Huh? Tell me that, sonny. The people who come from Earth's big cities, where TB has been breeding away for centuries. You check them all out, do you?"

From the corner of his eye, Simon saw Braddock Raines wince. He kept his own face impassive. "We employ the same procedures that every starship leaving Earth has always used, as mandated by UN quarantine law. We wouldn't be allowed to leave Earth orbit without them. Didn't the Navarro house starships use them?"

"Of course they damn well used them. We've remained uncontaminated until you bastards started invading us."

"Then why didn't it happen last time we were here?"

Edgar Strauss's glare deepened. "So this vaccine is another improvement you want us to adopt. Another product that is more sophisticated than anything we have."

"And your problem with that is...?"

"You're fattening us up for next time. That's what all this fallacious generosity is about. You even turn our misfortune to your advantage. These vaccines and metabiotics will be available for you to harvest on your next violence-crazed invasion, along with all the other advances. I've seen how many new designs you've released to our companies and universities. Neurotronics, software, biochemistry, genetics, even metallurgy and fusion plant design. You've made it all available out of the kindness of your heart."

"We want our investment in Thallspring to be successful. Naturally we help you in upgrading your technology and science base."

"But only for your profit. If we were still producing old-fashioned systems next time you come, you would reap no dividend."

"You think that?"

"I know that, and so do you."

"Then all you have to do is not use them. Go right ahead." Simon gestured expansively at the city beyond the window. "Tell them that, Mr. President. Persuade them they don't need the latest version memory management software, tell them they don't need next-generation brakes on their cars. Best of all, tell them they don't need better medicines."

"You'll lose in the end. You know that, don't you? There are fewer starships this time. Where did they go? Why didn't you build replacements? One day you'll come here and we'll be strong enough to resist. We grow while you wither away like every other decaying society in history. This is our time that's dawning. An end to starflight will bring an end to tyranny."

"Did your speechwriters dream that slogan up, or did you actually manage to think of it for yourself?"

"My grandchildren will dance all over your grave, you little shit." Edgar Strauss turned on his heel and marched out. He whistled the first few bars of Thallspring's anthem as he went.

Simon watched the door swing shut behind him. "My grave doesn't exist," he whispered to the president's back.

"That was fun," Braddock said stoically. "Would you like him to have an accident?"

Simon permitted himself a dry laugh. "Don't tempt me."

"So why am I here?"

"We're going to have to start this vaccination program that the medical AS recommends. I want you to supervise inoculating strategically important personnel: everyone who is critical to continued asset production. Start with the factory staff, but don't overlook people who work at the power stations and other ancillaries. I want to keep any disruption to our schedule to an absolute minimum."

"You've got it."

* * *

The pump station was unimpressive—a flat-roof box of concrete measuring twenty meters on each side, rucked away behind a chain-link fence, itself surrounded by a hedge of tall evergreen thorn bushes. It was in the corner of a small industrial estate on Durrell's outskirts, invisible from the trunk road outside, ignored by the estate.

At night, it was illuminated by tall halogen lights around the perimeter. One of them was off, while another flickered erratically. Maybe it was the angle of their beams, but they seemed to show up more cracks in the concrete walls than were visible during the day.

From his sheltered position in the hedge, Raymond studied the gate in the fence. A simple chain and padlock was all that held it. Although they'd studied long-range images, they'd never been quite sure if that was all. Now he could confirm it. One padlock.

Security wasn't a large part of the water utility's agenda. Enough to discourage local youths from breaking in and causing petty damage. To that end, there were a couple of alarms and sensors rigged outside—at least, they were the only ones listed in the station's inventory.

Prime was probing every aspect of the little station's internal data network, examining each pearl and circuit for hidden traps and alarms. And not just the station: the local datapool architecture was being scrutinized for inert links leading to the station, secondary trip alarms that would link into the datapool only when an intruder activated them. If they were there, the Prime couldn't find them.

Caution could only be taken so far before it became paranoia.

Raymond told the Prime to go to stage two. Images from the visual and infrared sensors around the station's door froze as the software infiltrated their processors, although their digital timers kept flipping through the seconds, making the feed appear live. Another routine inserted itself into the lock. Raymond heard it click from where he was hiding.

He slipped out of the shadows and scrambled up the fence. A quick gymnastic twist at the top, and he landed on the un-mown grass inside. It took another three seconds to reach the door and open it. Total elapsed exposure time, seven seconds. Not bad.

His d-written eyes immediately adjusted to the darkness inside, a tiny scattering of light gleaned from LEDs glowing on the equipment boards. There was only the one room. He could see the pumps, five bulky steel cylinders sitting on broad cradles. Thick pipes rose out of the concrete beside each one. Their heavy throbbing filled the air with a steady vibration.