"I'd consider it my duty," he said. "I'd be proud. It would make me feel safer."

Easy for him to say.

#

Vanessa didn't like me talking about this stuff, but she was too smart about it for me to stay away from the subject for long. We'd get together all the time, and talk about the weather and school and stuff, and then, somehow, I'd be back on this subject. Vanessa was cool when it happened -- she didn't Hulk out on me again -- but I could see it upset her.

Still.

"So my dad says, 'I'd consider it my duty.' Can you freaking believe it? I mean, God! I almost told him then about going to jail, asking him if he thought that was our 'duty'!"

We were sitting in the grass in Dolores Park after school, watching the dogs chase frisbees.

Van had stopped at home and changed into an old t-shirt for one of her favorite Brazilian tecno-brega bands, Carioca Proibidão -- the forbidden guy from Rio. She'd gotten the shirt at a live show we'd all gone to two years before, sneaking out for a grand adventure down at the Cow Palace, and she'd sprouted an inch or two since, so it was tight and rode up her tummy, showing her flat little belly button.

She lay back in the weak sun with her eyes closed behind her shades, her toes wiggling in her flip-flops. I'd known Van since forever, and when I thought of her, I usually saw the little kid I'd known with hundreds of jangly bracelets made out of sliced-up soda cans, who played the piano and couldn't dance to save her life. Sitting out there in Dolores Park, I suddenly saw her as she was.

She was totally h4wt -- that is to say, hot. It was like looking at that picture of a vase and noticing that it was also two faces. I could see that Van was just Van, but I could also see that she was hella pretty, something I'd never noticed.

Of course, Darryl had known it all along, and don't think that I wasn't bummed out anew when I realized this.

"You can't tell your dad, you know," she said. "You'd put us all at risk." Her eyes were closed and her chest was rising up and down with her breath, which was distracting in a really embarrassing way.

"Yeah," I said, glumly. "But the problem is that I know he's just totally full of it. If you pulled my dad over and made him prove he wasn't a child-molesting, drug-dealing terrorist, he'd go berserk. Totally off-the-rails. He hates being put on hold when he calls about his credit-card bill. Being locked in the back of a car and questioned for an hour would give him an aneurism."

"They only get away with it because the normals feel smug compared to the abnormals. If everyone was getting pulled over, it'd be a disaster. No one would ever get anywhere, they'd all be waiting to get questioned by the cops. Total gridlock."

Woah.

"Van, you are a total genius," I said.

"Tell me about it," she said. She had a lazy smile and she looked at me through half-lidded eyes, almost romantic.

"Seriously. We can do this. We can mess up the profiles easily. Getting people pulled over is easy."

She sat up and pushed her hair off her face and looked at me. I felt a little flip in my stomach, thinking that she was really impressed with me.

"It's the arphid cloners," I said. "They're totally easy to make. Just flash the firmware on a ten-dollar Radio Shack reader/writer and you're done. What we do is go around and randomly swap the tags on people, overwriting their Fast Passes and FasTraks with other people's codes. That'll make everyone skew all weird and screwy, and make everyone look guilty. Then: total gridlock."

Van pursed her lips and lowered her shades and I realized she was so angry she couldn't speak.

"Good bye, Marcus," she said, and got to her feet. Before I knew it, she was walking away so fast she was practically running.

"Van!" I called, getting to my feet and chasing after her. "Van! Wait!"

She picked up speed, making me run to catch up with her.

"Van, what the hell," I said, catching her arm. She jerked it away so hard I punched myself in the face.

"You're psycho, Marcus. You're going to put all your little Xnet buddies in danger for their lives, and on top of it, you're going to turn the whole city into terrorism suspects. Can't you stop before you hurt these people?"

I opened and closed my mouth a couple times. "Van, I'm not the problem, they are. I'm not arresting people, jailing them, making them disappear. The Department of Homeland Security are the ones doing that. I'm fighting back to make them stop."

"How, by making it worse?"

"Maybe it has to get worse to get better, Van. Isn't that what you were saying? If everyone was getting pulled over --"

"That's not what I meant. I didn't mean you should get everyone arrested. If you want to protest, join the protest movement. Do something positive. Didn't you learn anything from Darryl? Anything?"

"You're damned right I did," I said, losing my cool. "I learned that they can't be trusted. That if you're not fighting them, you're helping them. That they'll turn the country into a prison if we let them. What did you learn, Van? To be scared all the time, to sit tight and keep your head down and hope you don't get noticed? You think it's going to get better? If we don't do anything, this is as good as it's going to get. It will only get worse and worse from now on. You want to help Darryl? Help me bring them down!"

There it was again. My vow. Not to get Darryl free, but to bring down the entire DHS. That was crazy, even I knew it. But it was what I planned to do. No question about it.

Van shoved me hard with both hands. She was strong from school athletics -- fencing, lacrosse, field hockey, all the girls-school sports -- and I ended up on my ass on the disgusting San Francisco sidewalk. She took off and I didn't follow.

#

> The important thing about security systems isn't how they work, it's how they fail.

That was the first line of my first blog post on Open Revolt, my Xnet site. I was writing as M1k3y, and I was ready to go to war.

> Maybe all the automatic screening is supposed to catch terrorists. Maybe it will catch a terrorist sooner or later. The problem is that it catches us too, even though we're not doing anything wrong.

> The more people it catches, the more brittle it gets. If it catches too many people, it dies.

> Get the idea?

I pasted in my HOWTO for building a arphid cloner, and some tips for getting close enough to people to read and write their tags. I put my own cloner in the pocket of my vintage black leather motocross jacket with the armored pockets and left for school. I managed to clone six tags between home and Chavez High.

It was war they wanted. It was war they'd get.

#

If you ever decide to do something as stupid as build an automatic terrorism detector, here's a math lesson you need to learn first. It's called "the paradox of the false positive," and it's a doozy.

Say you have a new disease, called Super-AIDS. Only one in a million people gets Super-AIDS. You develop a test for Super-AIDS that's 99 percent accurate. I mean, 99 percent of the time, it gives the correct result -- true if the subject is infected, and false if the subject is healthy. You give the test to a million people.

One in a million people have Super-AIDS. One in a hundred people that you test will generate a "false positive" -- the test will say he has Super-AIDS even though he doesn't. That's what "99 percent accurate" means: one percent wrong.

What's one percent of one million?

1,000,000/100 = 10,000

One in a million people has Super-AIDS. If you test a million random people, you'll probably only find one case of real Super-AIDS. But your test won't identify one person as having Super-AIDS. It will identify 10,000 people as having it.

Your 99 percent accurate test will perform with 99.99 percent inaccuracy.

That's the paradox of the false positive. When you try to find something really rare, your test's accuracy has to match the rarity of the thing you're looking for. If you're trying to point at a single pixel on your screen, a sharp pencil is a good pointer: the pencil-tip is a lot smaller (more accurate) than the pixels. But a pencil-tip is no good at pointing at a single atom in your screen. For that, you need a pointer -- a test -- that's one atom wide or less at the tip.

This is the paradox of the false positive, and here's how it applies to terrorism:

Terrorists are really rare. In a city of twenty million like New York, there might be one or two terrorists. Maybe ten of them at the outside. 10/20,000,000 = 0.00005 percent. One twenty-thousandth of a percent.

That's pretty rare all right. Now, say you've got some software that can sift through all the bank-records, or toll-pass records, or public transit records, or phone-call records in the city and catch terrorists 99 percent of the time.

In a pool of twenty million people, a 99 percent accurate test will identify two hundred thousand people as being terrorists. But only ten of them are terrorists. To catch ten bad guys, you have to haul in and investigate two hundred thousand innocent people.

Guess what? Terrorism tests aren't anywhere close to 99 percent accurate. More like 60 percent accurate. Even 40 percent accurate, sometimes.

What this all meant was that the Department of Homeland Security had set itself up to fail badly. They were trying to spot incredibly rare events -- a person is a terrorist -- with inaccurate systems.

Is it any wonder we were able to make such a mess?

#

I stepped out the front door whistling on a Tuesday morning one week into the Operation False Positive. I was rockin' out to some new music I'd downloaded from the Xnet the night before -- lots of people sent M1k3y little digital gifts to say thank you for giving them hope.

I turned onto 23d Street and carefully took the narrow stone steps cut into the side of the hill. As I descended, I passed Mr Wiener Dog. I don't know Mr Wiener Dog's real name, but I see him nearly every day, walking his three panting wiener dogs up the staircase to the little parkette. Squeezing past them all on the stairs is pretty much impossible and I always end up tangled in a leash, knocked into someone's front garden, or perched on the bumper of one of the cars parked next to the curb.

Mr Wiener Dog is clearly Someone Important, because he has a fancy watch and always wears a nice suit. I had mentally assumed that he worked down in the financial district.

Today as I brushed up against him, I triggered my arphid cloner, which was already loaded in the pocket of my leather jacket. The cloner sucked down the numbers off his credit-cards and his car-keys, his passport and the hundred-dollar bills in his wallet.

Even as it was doing that, it was flashing some of them with new numbers, taken from other people I'd brushed against. It was like switching the license-plates on a bunch of cars, but invisible and instantaneous. I smiled apologetically at Mr Wiener Dog and continued down the stairs. I stopped at three of the cars long enough to swap their FasTrak tags with numbers taken offall over cars I'd gone past the day before.

You might think I was being a little aggro here, but I was cautious and conservative compared to a lot of the Xnetters. A couple girls in the Chemical Engineering program at UC Berkeley had figured out how to make a harmless substance out of kitchen products that would trip an explosive sniffer. They'd had a merry time sprinkling it on their profs' briefcases and jackets, then hiding out and watching the same profs try to get into the auditoriums and libraries on campus, only to get flying-tackled by the new security squads that had sprung up everywhere.

Other people wanted to figure out how to dust envelopes with substances that would test positive for anthrax, but everyone else thought they were out of their minds. Luckily, it didn't seem like they'd be able to figure it out.

I passed by San Francisco General Hospital and nodded with satisfaction as I saw the huge lines at the front doors. They had a police checkpoint too, of course, and there were enough Xnetters working as interns and cafeteria workers and whatnot there that everyone's badges had been snarled up and swapped around. I'd read the security checks had tacked an hour onto everyone's work day, and the unions were threatening to walk out unless the hospital did something about it.

A few blocks later, I saw an even longer line for the BART. Cops were walking up and down the line pointing people out and calling them aside for questioning, bag-searches and pat-downs. They kept getting sued for doing this, but it didn't seem to be slowing them down.

I got to school a little ahead of time and decided to walk down to 22nd Street to get a coffee -- and I passed a police checkpoint where they were pulling over cars for secondary inspection.

School was no less wild -- the security guards on the metal detectors were also wanding our school IDs and pulling out students with odd movements for questioning. Needless to say, we all had pretty weird movements. Needless to say, classes were starting an hour or more later.

Classes were crazy. I don't think anyone was able to concentrate. I overheard two teachers talking about how long it had taken them to get home from work the day before, and planning to sneak out early that day.

It was all I could do to keep from laughing. The paradox of the false positive strikes again!

Sure enough, they let us out of class early and I headed home the long way, circling through the Mission to see the havoc. Long lines of cars. BART stations lined up around the blocks. People swearing at ATMs that wouldn't dispense their money because they'd had their accounts frozen for suspicious activity (that's the danger of wiring your checking account straight into your FasTrak and Fast Pass!).

I got home and made myself a sandwich and logged into the Xnet. It had been a good day. People from all over town were crowing about their successes. We'd brought the city of San Francisco to a standstill. The news-reports confirmed it -- they were calling it the DHS gone haywire, blaming it all on the fake-ass "security" that was supposed to be protecting us from terrorism. The Business section of the San Francisco Chronicle gave its whole front page to an estimate of the economic cost of the DHS security resulting from missed work hours, meetings and so on. According to the Chronicle's economist, a week of this crap would cost the city more than the Bay Bridge bombing had.

Mwa-ha-ha-ha.

The best part: Dad got home that night late. Very late. Three hours late. Why? Because he'd been pulled over, searched, questioned. Then it happened again. Twice.

Twice!

Chapter 9

This chapter is dedicated to Compass Books/Books Inc, the oldest independent bookstore in the western USA. They've got stores up and down California, in San Francisco, Burlingame, Mountain View and Palo Alto, but coolest of all is that they run a killer bookstore in the middle of Disneyland's Downtown Disney in Anaheim. I'm a stone Disney park freak (see my first novel, Down and Out in the Magic Kingdom if you don't believe it), and every time I've lived in California, I've bought myself an annual Disneyland pass, and on practically every visit, I drop by Compass Books in Downtown Disney. They stock a brilliant selection of unauthorized (and even critical) books about Disney, as well as a great variety of kids books and science fiction, and the cafe next door makes a mean cappuccino.

Compass Books/Books Inc

He was so angry I thought he was going to pop. You know I said I'd only seen him lose his cool rarely? That night, he lost it more than he ever had.

"You wouldn't believe it. This cop, he was like eighteen years old and he kept saying, 'But sir, why were you in Berkeley yesterday if your client is in Mountain View?' I kept explaining to him that I teach at Berkeley and then he'd say, 'I thought you were a consultant,' and we'd start over again. It was like some kind of sitcom where the cops have been taken over by the stupidity ray.

"What's worse was he kept insisting that I'd been in Berkeley today as well, and I kept saying no, I hadn't been, and he said I had been. Then he showed me my FasTrak billing and it said I'd driven the San Mateo bridge three times that day!

"That's not all," he said, and drew in a breath that let me know he was really steamed. "They had information about where I'd been, places that didn't have a toll plaza. They'd been polling my pass just on the street, at random. And it was wrong! Holy crap, I mean, they're spying on us all and they're not even competent!"

I'd drifted down into the kitchen as he railed there, and now I was watching him from the doorway. Mom met my eye and we both raised our eyebrows as if to say, Who's going to say 'I told you so' to him? I nodded at her. She could use her spousular powers to nullify his rage in a way that was out of my reach as a mere filial unit.

"Drew," she said, and grabbed him by the arm to make him stop stalking back and forth in the kitchen, waving his arms like a street-preacher.

"What?" he snapped.

"I think you owe Marcus an apology." She kept her voice even and level. Dad and I are the spazzes in the household -- Mom's a total rock.

Dad looked at me. His eyes narrowed as he thought for a minute. "All right," he said at last. "You're right. I was talking about competent surveillance. These guys were total amateurs. I'm sorry, son," he said. "You were right. That was ridiculous." He stuck his hand out and shook my hand, then gave me a firm, unexpected hug.

"God, what are we doing to this country, Marcus? Your generation deserves to inherit something better than this." When he let me go, I could see the deep wrinkles in his face, lines I'd never noticed.

I went back up to my room and played some Xnet games. There was a good multiplayer thing, a clockwork pirate game where you had to quest every day or two to wind up your whole crew's mainsprings before you could go plundering and pillaging again. It was the kind of game I hated but couldn't stop playing: lots of repetitive quests that weren't all that satisfying to complete, a little bit of player-versus-player combat (scrapping to see who would captain the ship) and not that many cool puzzles that you had to figure out. Mostly, playing this kind of game made me homesick for Harajuku Fun Madness, which balanced out running around in the real world, figuring out online puzzles, and strategizing with your team.

But today it was just what I needed. Mindless entertainment.

My poor dad.

I'd done that to him. He'd been happy before, confident that his tax dollars were being spent to keep him safe. I'd destroyed that confidence. It was false confidence, of course, but it had kept him going. Seeing him now, miserable and broken, I wondered if it was better to be clear-eyed and hopeless or to live in a fool's paradise. That shame -- the shame I'd felt since I gave up my passwords, since they'd broken me -- returned, leaving me listless and wanting to just get away from myself.

My character was a swabbie on the pirate ship Zombie Charger, and he'd wound down while I'd been offline. I had to IM all the other players on my ship until I found one willing to wind me up. That kept me occupied. I liked it, actually. There was something magic about a total stranger doing you a favor. And since it was the Xnet, I knew that all the strangers were friends, in some sense.

> Where u located?

The character who wound me up was called Lizanator, and it was female, though that didn't mean that it was a girl. Guys had some weird affinity for playing female characters.

> San Francisco

I said.

> No stupe, where you located in San Fran?

> Why, you a pervert?

That usually shut down that line of conversation. Of course every gamespace was full of pedos and pervs, and cops pretending to be pedo- and perv-bait (though I sure hoped there weren't any cops on the Xnet!). An accusation like that was enough to change the subject nine out of ten times.

> Mission? Potrero Hill? Noe? East Bay?

> Just wind me up k thx?

She stopped winding.

> You scared?

> Safe -- why do you care?

> Just curious

I was getting a bad vibe off her. She was clearly more than just curious. Call it paranoia. I logged off and shut down my Xbox.

#

Dad looked at me over the table the next morning and said, "It looks like it's going to get better, at least." He handed me a copy of the Chronicle open to the third page.

> A Department of Homeland Security spokesman has confirmed that the San Francisco office has requested a 300 percent budget and personnel increase from DC

What?

> Major General Graeme Sutherland, the commanding officer for Northern California DHS operations, confirmed the request at a press conference yesterday, noting that a spike in suspicious activity in the Bay Area prompted the request. "We are tracking a spike in underground chatter and activity and believe that saboteurs are deliberately manufacturing false security alerts to undermine our efforts."

My eyes crossed. No freaking way.

> "These false alarms are potentially 'radar chaff' intended to disguise real attacks. The only effective way of combatting them is to step up staffing and analyst levels so that we can fully investigate every lead."

> Sutherland noted the delays experienced all over the city were "unfortunate" and committed to eliminating them.

I had a vision of the city with four or five times as many DHS enforcers, brought in to make up for my own stupid ideas. Van was right. The more I fought them, the worse it was going to get.

Dad pointed at the paper. "These guys may be fools, but they're methodical fools. They'll just keep throwing resources at this problem until they solve it. It's tractable, you know. Mining all the data in the city, following up on every lead. They'll catch the terrorists."

I lost it. "Dad! Are you listening to yourself? They're talking about investigating practically every person in the city of San Francisco!"

"Yeah," he said, "that's right. They'll catch every alimony cheat, every dope dealer, every dirt-bag and every terrorist. You just wait. This could be the best thing that ever happened to this country."

"Tell me you're joking," I said. "I beg you. You think that that's what they intended when they wrote the Constitution? What about the Bill of Rights?"

"The Bill of Rights was written before data-mining," he said. He was awesomely serene, convinced of his rightness. "The right to freedom of association is fine, but why shouldn't the cops be allowed to mine your social network to figure out if you're hanging out with gangbangers and terrorists?"

"Because it's an invasion of my privacy!" I said.

"What's the big deal? Would you rather have privacy or terrorists?"

Agh. I hated arguing with my dad like this. I needed a coffee. "Dad, come on. Taking away our privacy isn't catching terrorists: it's just inconveniencing normal people."

"How do you know it's not catching terrorists?"

"Where are the terrorists they've caught?"

"I'm sure we'll see arrests in good time. You just wait."

"Dad, what the hell has happened to you since last night? You were ready to go nuclear on the cops for pulling you over --"

"Don't use that tone with me, Marcus. What's happened since last night is that I've had the chance to think it over and to read this." He rattled his paper. "The reason they caught me is that the bad guys are actively jamming them. They need to adjust their techniques to overcome the jamming. But they'll get there. Meanwhile the occasional road stop is a small price to pay. This isn't the time to be playing lawyer about the Bill of Rights. This is the time to make some sacrifices to keep our city safe."

I couldn't finish my toast. I put the plate in the dishwasher and left for school. I had to get out of there.

#

The Xnetters weren't happy about the stepped up police surveillance, but they weren't going to take it lying down. Someone called a phone-in show on KQED and told them that the police were wasting their time, that we could monkeywrench the system faster than they could untangle it. The recording was a top Xnet download that night.

"This is California Live and we're talking to an anonymous caller at a payphone in San Francisco. He has his own information about the slowdowns we've been facing around town this week. Caller, you're on the air."

"Yeah, yo, this is just the beginning, you know? I mean, like, we're just getting started. Let them hire a billion pigs and put a checkpoint on every corner. We'll jam them all! And like, all this crap about terrorists? We're not terrorists! Give me a break, I mean, really! We're jamming up the system because we hate the Homeland Security, and because we love our city. Terrorists? I can't even spell jihad. Peace out."

He sounded like an idiot. Not just the incoherent words, but also his gloating tone. He sounded like a kid who was indecently proud of himself. He was a kid who was indecently proud of himself.

The Xnet flamed out over this. Lots of people thought he was an idiot for calling in, while others thought he was a hero. I worried that there was probably a camera aimed at the payphone he'd used. Or an arphid reader that might have sniffed his Fast Pass. I hoped he'd had the smarts to wipe his fingerprints off the quarter, keep his hood up, and leave all his arphids at home. But I doubted it. I wondered if he'd get a knock on the door sometime soon.

The way I knew when something big had happened on Xnet was that I'd suddenly get a million emails from people who wanted M1k3y to know about the latest haps. It was just as I was reading about Mr Can't-Spell-Jihad that my mailbox went crazy. Everyone had a message for me -- a link to a livejournal on the Xnet -- one of the many anonymous blogs that were based on the Freenet document publishing system that was also used by Chinese democracy advocates.

> Close call

> We were jamming at the Embarcadero tonite and goofing around giving everyone a new car key or door key or Fast Pass or FasTrak, tossing around a little fake gunpowder. There were cops everywhere but we were smarter then them; we're there pretty much every night and we never get caught.

> So we got caught tonight. It was a stupid mistake we got sloppy we got busted. It was an undercover who caught my pal and then got the rest of us. They'd been watching the crowd for a long time and they had one of those trucks nearby and they took four of us in but missed the rest.

> The truck was JAMMED like a can of sardines with every kind of person, old young black white rich poor all suspects, and there were two cops trying to ask us questions and the undercovers kept bringing in more of us. Most people were trying to get to the front of the line to get through questioning so we kept on moving back and it was like hours in there and really hot and it was getting more crowded not less.

> At like 8PM they changed shifts and two new cops came in and bawled out the two cops who were there all like wtf? aren't you doing anything here. They had a real fight and then the two old cops left and the new cops sat down at their desks and whispered to each other for a while.

> Then one cop stood up and started shouting EVERYONE JUST GO HOME JESUS CHRIST WE'VE GOT BETTER THINGS TO DO THAN BOTHER YOU WITH MORE QUESTIONS IF YOU'VE DONE SOMETHING WRONG JUST DON'T DO IT AGAIN AND LET THIS BE A WARNING TO YOU ALL.

> A bunch of the suits got really pissed which was HILARIOUS because I mean ten minutes before they were buggin about being held there and now they were wicked pissed about being let go, like make up your minds!

> We split fast though and got out and came home to write this. There are undercovers everywhere, believe. If you're jamming, be open-eyed and get ready to run when problems happen. If you get caught try to wait it out they're so busy they'll maybe just let you go.

> We made them that busy! All those people in that truck were there because we'd jammed them. So jam on!

I felt like I was going to throw up. Those four people -- kids I'd never met -- they nearly went away forever because of something I'd started.

Because of something I'd told them to do. I was no better than a terrorist.

#

The DHS got their budget requisition approved. The President went on TV with the Governor to tell us that no price was too high for security. We had to watch it the next day in school at assembly. My Dad cheered. He'd hated the President since the day he was elected, saying he wasn't any better than the last guy and the last guy had been a complete disaster, but now all he could do was talk about how decisive and dynamic the new guy was.

"You have to take it easy on your father," Mom said to me one night after I got home from school. She'd been working from home as much as possible. Mom's a freelance relocation specialist who helps British people get settled in in San Francisco. The UK High Commission pays her to answer emails from mystified British people across the country who are totally confused by how freaky we Americans are. She explains Americans for a living, and she said that these days it was better to do that from home, where she didn't have to actually see any Americans or talk to them.

I don't have any illusions about Britain. America may be willing to trash its Constitution every time some Jihadist looks cross-eyed at us, but as I learned in my ninth-grade Social Studies independent project, the Brits don't even have a Constitution. They've got laws there that would curl the hair on your toes: they can put you in jail for an entire year if they're really sure that you're a terrorist but don't have enough evidence to prove it. Now, how sure can they be if they don't have enough evidence to prove it? How'd they get that sure? Did they see you committing terrorist acts in a really vivid dream?

And the surveillance in Britain makes America look like amateur hour. The average Londoner is photographed 500 times a day, just walking around the streets. Every license plate is photographed at every corner in the country. Everyone from the banks to the public transit company is enthusiastic about tracking you and snitching on you if they think you're remotely suspicious.

But Mom didn't see it that way. She'd left Britain halfway through high school and she'd never felt at home here, no matter that she'd married a boy from Petaluma and raised a son here. To her, this was always the land of barbarians, and Britain would always be home.

"Mom, he's just wrong. You of all people should know that. Everything that makes this country great is being flushed down the toilet and he's going along with it. Have you noticed that they haven't caught any terrorists? Dad's all like, 'We need to be safe,' but he needs to know that most of us don't feel safe. We feel endangered all the time."

"I know this all, Marcus. Believe me, I'm not fan of what's been happening to this country. But your father is --" She broke off. "When you didn't come home after the attacks, he thought --"

She got up and made herself a cup of tea, something she did whenever she was uncomfortable or disconcerted.

"Marcus," she said. "Marcus, we thought you were dead. Do you understand that? We were mourning you for days. We were imagining you blown to bits, at the bottom of the ocean. Dead because some bastard decided to kill hundreds of strangers to make some point."

That sank in slowly. I mean, I understood that they'd been worried. Lots of people died in the bombings -- four thousand was the present estimate -- and practically everyone knew someone who didn't come home that day. There were two people from my school who had disappeared.

"Your father was ready to kill someone. Anyone. He was out of his mind. You've never seen him like this. I've never seen him like it either. He was out of his mind. He'd just sit at this table and curse and curse and curse. Vile words, words I'd never heard him say. One day -- the third day -- someone called and he was sure it was you, but it was a wrong number and he threw the phone so hard it disintegrated into thousands of pieces." I'd wondered about the new kitchen phone.

"Something broke in your father. He loves you. We both love you. You are the most important thing in our lives. I don't think you realize that. Do you remember when you were ten, when I went home to London for all that time? Do you remember?"

I nodded silently.