A BROWN RING OF rock and gravel encircled the island’s cove, melding into a white sheet of ice as one moved inland. The exception was a large rectangular rut that ran several hundred feet into the hillside, ending in a flat, vertical wall clearly cut by machine. The zinc-mining operation was simply cutting straight into the landscape, where the mineral-rich ore was readily accessible. In the distance, Zak noticed a few of the geologists poking around the tailings of the most recent diggings.

The interior of the cove was protected from the worst of the westerly winds, but Zak still moved quickly down the dock, not wishing to prolong his exposure to the cold. He quickly sized up the mining operation before him, which was simple and low-tech. The larger of two buildings was a warehouse that housed the mining equipment—bulldozers, backhoes, and a dump truck—which dug up the island soil and transferred it onto a small conveyor system for shipboard loading. A smaller building next door would be the crew’s bunkhouse and administrative office.

Zak made his way to the smaller building first, curiously finding that the door had been locked. Pulling a Glock automatic from his pocket, he fired twice at the dead bolt, then kicked the door open. The interior was like an expansive house, with two large bedrooms filled with bunk beds, plus an oversize kitchen, a dining room, and a living area. Zak walked directly to the kitchen and looked at the stove, which trailed a gas line to a storage closet containing a large tank of propane. Digging into his satchel, he removed a charge of dynamite and placed it beneath the tank, then affixed a blasting cap with a timed fuse. Checking his watch, he set the fuse to ignite in ninety minutes, then exited the building.

He walked to the equipment-storage building, studying its exterior for some time before hiking around to the back side. Towering over the building was a small bluff, which was strewn with ice-covered rocks and boulders. He struggled up the steep slope to a slight ledge that ran horizontally across the upper face of the hill. Kicking a divot in the frozen ground beneath a car-sized boulder, he removed his gloves and placed another charge of dynamite under the rock. With his fingers freezing, he quickly set the fuse to the blasting cap. Moving a few yards away, he set a second charge beneath a similar clump of large boulders.