DAY 7

9:11 A.M.

The helicopter pilot pushed the doors open as we ran across the pad. We jumped in. Mae said, "Go!"

He said, "I'll have to insist you get your harnesses on before-"

"Fly this fucking thing!" I yelled.

"Sorry, it's a regulation, and it's not safe-"

Black smoke started to pour out of the power station door we had just come out of. It billowed into the blue desert sky.

The pilot saw it and said, "Hang on!"

We lifted off and headed north, swinging wide of the building. Now there was smoke coming from all the exhaust vents near the roof. A black haze was rising into the air. Mae said, "Fire burns the nanoparticles and the bacteria, too. Don't worry."

The pilot said, "Where are we going?"

"Home."

He headed west, and within minutes we had left the building behind. It disappeared below the horizon. Mae was sitting back in her seat, eyes closed. I said to her, "I thought it was going to blow up. But they turned the safety system back on again. So I guess it won't." She said nothing.

I said, "So what was the big rush to get out of there? And where were you, anyway? Nobody could find you."

She said, "I was outside, in the storage shed."

"Doing what?"

"Looking for more thermite."

"Find any?"

There was no sound. Just a flash of yellow light that spread across the desert horizon for an instant, and then faded. You could almost believe it never happened. But the helicopter rocked and jolted as the shock wave passed us.

The pilot said, "Holy Mother of God, what was that?"

"Industrial accident," I said. "Very unfortunate."

He reached for his radio. "I better report it."

"Yes," I said. "You better do that."

We flew west, and I saw the green line of the forest and the rolling foothills of the Sierras, as we crossed into California.

DAY 7

11:57 P.M.

It's late.

Almost midnight. The house is silent around me. I am not sure how this will turn out. The kids are all desperately sick, throwing up after I gave them the virus. I can hear my son and daughter retching in separate bathrooms. I went in to check on them a few minutes ago, to see what was coming up. Their faces were deathly pale. I can see they're afraid, because they know I'm afraid. I haven't told them about Julia yet. They haven't asked. They're too sick to ask right now.

I'm worried most about the baby, because I had to give her the virus, too. It was her only hope. Ellen's with her now, but Ellen is vomiting, too. The baby has yet to throw up. I don't know whether that's good or bad. Young kids react differently.

I think I'm okay, at least for the moment. I'm dead tired. I think I've been dozing off from time to time all night. Right now I'm sitting here looking out the back window, waiting for Mae. She hopped the fence at the end of my backyard, and is probably scrambling around in the brush on the slope that goes down behind the property, where the sprinklers are. She thought there was a faint green light coming from somewhere down the slope. I told her not to go down there alone, but I'm too tired to go get her. If she waits until tomorrow, the Army can come here with flame throwers and blast the hell out of whatever it is.

The Army is acting dumb about this whole thing, but I have Julia's computer here at home, and I have an email trail on her hard drive. I removed the hard drive, just to be safe. I duped it, and put the original in a safe deposit box in town. I'm not really worried about the Army. I'm worried about Larry Handler and the others at Xymos. They know they have horrific lawsuits on their hands. The company will declare bankruptcy sometime this week, but they're still liable for criminal charges. Larry especially. I wouldn't cry if he went to jail. Mae and I have managed to put together most of the events of the past few days. My daughter's rash was caused by gamma assemblers-the micromachines that assembled finished molecules from component fragments. The gammas must have been on Julia's clothing when she came home from the lab. Julia worried about that possibility; that was why she took a shower as soon as she got home. The lab itself had good decontamination procedures, but Julia was interacting with the swarms outside the lab. She knew there was a danger. Anyway, that night she accidentally let the gammas loose in the nursery. The gamma assemblers are designed to cut microfragments of silicon, but faced with a pliable substance like skin, they only pinch it. It's painful, and causes microtrauma of a sort that nobody had ever seen before. Or would ever have suspected. No wonder Amanda didn't have a fever. She didn't have an infection. She had a coating of biting particles on her skin. The magnetic field of the MRI cured her in an instant; all the assemblers were yanked away from her in the first pulse. (Apparently that is also what happened to the guy in the desert. He somehow came in contact with a batch of assemblers. He had been camping within a mile of the Xymos desert facility.) Julia knew what was wrong with Amanda, but she didn't tell anybody. Instead she called the Xymos cleanup crew, which showed up in the middle of the night while I was at the hospital. Only Eric saw them, and now I know what he saw. Because the same crew arrived here a few hours ago to sweep my house. They were the same men I'd seen in the van on the road that night.

The lead man wears a silver bunny suit that's antimagnetic, and he does look ghostly. His silvered mask makes him appear faceless. He goes into the environment first to check it out. Then four other men in coveralls follow, to vacuum and clean up. I had told Eric he'd dreamed it, but he hadn't. The crew left behind one of their sensor cubes, under Amanda's bed. That was intentional, to check for residual gammas in case they'd missed any. It wasn't a surge suppressor; it was just constructed to look like one.

When I finally figured all this out, I was furious with Julia for not telling me what was going on. For making me worry. But of course, she was diseased. And there's no point in being angry with her now.

Eric's MP3 player was cut by gamma assemblers, the same way the cars in the desert were. And just as the MRI was. For some reason the gamma assemblers cut memory chips and leave central processors alone. I haven't heard an explanation why. There was a swarm in the convertible with Julia that night. It had come back with her from the desert. I don't know whether she brought it intentionally or not. The swarm could collapse into nothing, which is why Eric didn't see anything when he went out to the car to look. And I wasn't sure of what I saw when she pulled away, which was reasonable enough. The swarm was probably catching the light in odd ways. In my memory, it looked a little like Ricky, but it was probably too soon for the swarm to be taking on appearances. It hadn't evolved that much, yet. Or maybe I just saw an indistinct shape, and in my jealousy I imagined it to be a person. I don't think I made it up, but maybe I did. Ellen thinks I might have. After her car crashed, Julia called for the cleanup crews. That's why they were there on the road late that night. They were waiting to go down the hill and clean up the site. I don't know what caused the crash itself, whether it was something to do with the swarm or whether it was just an accident. There's no one to ask about it now.

The facility in the desert was entirely destroyed. There was enough methane in the main laboratory to produce a fireball in excess of two thousand degrees Fahrenheit. Any biological materials would have been incinerated. But I still worry. They never found any bodies in the ruins, not even skeletons. …

Mae took the bacteriophage to her old lab in Palo Alto. I hope she made them understand how desperate the situation is. She's being very quiet about their reaction. I think they should put the phage into the water supply, but Mae says the chlorine will take it out. Maybe there should be a vaccine program. As far as we know, the phage works to kill the swarms. Sometimes I have ringing in my ears, which is a worrisome sign. And I feel a vibrating in my chest and abdomen. I can't tell if I am just paranoid, or if something is really happening to me. I try to keep a brave face for the kids, but of course you can't fool kids. They know I'm frightened.