By now the cabbie was scared of his passenger and complied without protest. He’d stop talking since the man with the gun had flagged him down. His only thoughts were of his two children. He wanted desperately to remain alive; if he died, there was every chance his wife would take them to live with his in-laws.

“WHERE’S HE GOING?” FLASH ASKED NURI AS THEY LEFT the highway.

“No idea. Maybe he has to report back in. Maybe he’s running away.”

“Why didn’t he just get on a plane at the airport, then?”

“Don’t know.”

Flash checked his pistol, double-checking that no one had messed with it in the brief time it had been out of his possession. They’d swung back to grab their gear; he’d hoped to get something to eat as well, but the shop had closed.

Nuri leaned over and glanced at the fuel gauge. They were starting to run low.

Especially in the dark, the towns around Tehran looked similar to the close-in towns around capitals in the West, with clusters of apartment blocks punctuated by small lots of single-family houses. Except for the spirals of the mosques lit by spotlights in the distance, they could have been practically anywhere in the developed world, at the edge of Brooklyn or Naples or Moscow, Istanbul, Berlin.

“Maybe he’s looking for a McDonald’s,” joked Flash. “I could use one of them myself.”

“You’re not full from dinner?”

“There’s always room for a Big Mac.”

“There’s no McDonald’s in Iran.”

“Shame.”

The Voice told Nuri that Tarid’s cab was stopping three blocks ahead. Flash closed the distance just in time to see Tarid leaning in to pay off the driver. He was in front of a bus station.

“Get out and get the cab,” Nuri told Flash. “Have him stop two blocks down.”

“Tarid’s going to see me.”

“Don’t worry about it. We have to scan the interior. We don’t need him anymore.”

Flash opened the door and got out, walking briskly toward the cab. Tarid turned, saw him, then darted in front of the cab, running across the street to the bus station.

“I need a ride,” said Flash in English.

The taxi driver pretended he didn’t understand. Before he could start away, Flash grabbed and opened the rear door.

Sure he was about to be killed, the driver stepped on the gas. Flash threw himself into the taxi, diving into the backseat and pulling himself up. The driver swerved down a side street, then back up another.

The tourist gig wasn’t working. Flash decided to take a different approach.

He pulled out his pistol and placed it at the man’s neck.

“Stop,” he told him.

The driver started to shake his head.

“Stop.”

Flash pressed the barrel harder against the driver’s flesh. He reached into his pocket and tossed the bills he had on the front seat. It was a considerable sum, more than the driver ordinarily made in a month.

“Stop,” said Flash, poking the gun hard into his neck.

The bills allayed just enough of the driver’s fear to make him stop.

Nuri pulled up behind him and sprang from the car. He carried the sniffer in both hands, holding it in front of him as if it were a divining rod.

“Do not worry,” he told the man in Farsi as he pushed the detector toward the open window. “This will not harm you or your car. We will leave you alone in just a minute.”

He didn’t get a read. He opened the door to the back, bending in as Flash slid to the side, still holding the gun at the man’s neck.

The detector was set to pick up traces of chemicals used in Semtex and other plastic explosives. It was negative; there were no traces in the cab.

Though extremely sensitive, the sniffer could be defeated. A very careful bomb maker working in a clean room could, for example, wrap the explosive very securely and make sure that there were no stray traces on the bag. But in Nuri’s experience, that simply didn’t happen; bombs were almost never constructed that carefully.

“Nothing?” asked Flash.

Nuri started to back out of the vehicle. The president’s plane would be inspected before it took off. The Iranians undoubtedly had equipment similar to his, though not as powerful nor as portable.

So a plastic explosive would be discovered.

Fuel, though…

“Wait here,” Nuri told Flash. He stepped to the side of the road, closer to the street lamp, and recalibrated the device. Then he took a second sample from the back, pushing the sniffer right against the floor.

There was a very slight hit of an ammonia compound.

“You use rocket fuel to power your taxi?” Nuri asked the man.

The cab driver was baffled. Nuri reached into his pocket for some bills.

“I already paid him a fortune,” said Flash, getting out the other side.

Nuri tossed the money on the man’s lap anyway. “Forget tonight,” he told him. “It will be the best for you. Go home to your family and forget everything else.”

TARID RAN INSIDE THE BUS STATION. THERE WERE ONLY TWO buses at the queues, and neither was ready to leave. He glanced at the empty driver’s seat of the one at the head of the line, thinking he might steal it. But a bus would be too easy to follow, and besides, he wasn’t sure if he could even drive it. He trotted in front of it, crossing to the other side of the platform.

As he reached the other side, he saw a man walking briskly into the station across from him, his hand in his pocket. Tarid ducked behind a closed newsstand, moving to the opposite end. He started to look around the corner, but stopped as he heard the footsteps; the man was running toward him.

Tarid turned. The station had a low cement wall on the other side of the bus queue, with several openings to a nearby parking lot. He sprang toward it.

As he did, a shot rang out.

“THEY’VE PUT A BOMB ON THE IRANIAN PRESIDENT’S PLANE,” Nuri told Reid as he got back into the car. “It has some sort of fuel in it—they’re probably going to set it into one of the fuel tanks or the wing area.”

“You’re sure?” asked Reid.

“There was some sort of fuel in whatever Tarid carried to the airport,” said Nuri. He was using the Voice to connect to Reid’s CIA phone, and there was a slight but noticeable delay as the transmissions synced. “I’m guessing at everything else.”

Flash backed the car up into a nearby driveway, then drove back toward the bus station.

“Where is your subject now?” asked Reid.

“He looks like he’s going on a bus ride. I’m going to follow. We may have a chance to grab him.”

“That may not be wise.”

“He’d be a great source.”

“You’ll have trouble getting him out. We may not even be able to get you out.”

“We’ll see what happens,” said Nuri. “I’ll be back.”

“Hey—that SUV is up on the curb,” said Flash. “And it wasn’t there before.”

Nuri realized it was similar to the truck that the man with the flashlight had been sitting in at the complex. He didn’t even need the Voice to make a comparison.

“Stop the car,” said Nuri. He grabbed the door handle. “Come on. Quick.”

TARID FELT THE BULLET HIT HIM IN THE LEG. THE PAIN FELT absurdly minimal, barely a sting from a bee. He was even able to stay on his feet, running behind a car and throwing himself down as two more shots sailed over his head.

It was only when he hit the ground that the real pain began. His leg felt as if it had been twisted below his knee. It was on fire. Then it seemed that something had grabbed his calf. It was a lobster claw, gripping and twisting.

He started to get up but his leg betrayed him. He no longer had control over it.

He was going to die here, in a parking lot outside of Tehran.

What a shame that he hadn’t made love to Simin.

Tarid began pushing himself forward, crawling away.

He heard the footsteps again, louder, coming for him. Desperate, he rolled himself under a nearby car, trying to quiet his breath.

For a few seconds it seemed as if he had escaped. The footsteps grew faint. The lot was silent. Tarid’s head began to float, his body entering protective shock.