Gus examined the schematic that was spread out on the tiny table in the engine’s cab. He glanced at the panel, then back to the drawing. “Interior lights.”

“Flyers, you don’t need thirty amps for that.” Michael jimmied the second breaker free and swapped it for the first one. He closed the knife switch again, waiting for the breaker to pop. When it didn’t, he said, “That’s it.”

Gus was frowning doubtfully. “That’s it?”

“They must have gotten switched. It’s got nothing to do with the head-end unit. Reset the relay and I’ll show you.”

Michael moved forward to the cab, where Billie was waiting in one of the two swiveling chairs at the windshield. Everyone else was gone; the rest of the crew had left just after dark in Billie’s pickup, headed for the rendezvous.

Michael took the other chair. He turned the key set in the panel beside the throttle; from below they heard the batteries spinning up. The dials on the panel began to glow, a cool blue. Through the narrow slit between the protective plates, Michael could see a curtain of stars beyond the open doors of the shed. Well, he thought, it’s now or never. Either there was current to the starter or there wasn’t. He’d found one problem but who knew how many others there might be. It had taken him twelve days to fix one Humvee. Everything he’d done here, he’d done in a little under three hours.

Michael lifted his voice to the rear of the car, where Gus was priming the fuel system, clearing any air from the line: “Go ahead!”

Gus fired the starter. A great roar rose from below, carrying the satisfying smell of combusting diesel. The engine gave a shuddering lurch as the wheels engaged and began to push against their brakes.

“So,” Michael said, turning to Billie, “how do you drive this thing?”

Chapter Fifty-Five

FIFTY-FIVE

In the end, they could only take Olson at his word. They simply had no choice.

They divvied up the weapons and split into two groups. Olson and his men would storm the room from ground level while Peter and the others entered from above. The space they called the ring had once been the prison’s central courtyard, covered by a domed roof. Part of the roof had fallen away, leaving the space open to the outside, but the original structural girders were intact. Suspended from these girders, fifteen meters above the ring, was a series of catwalks, once used by the guards to monitor the floor below. These were arranged like the spokes of a wheel with ducts running above them, wide enough for a person to crawl through.