Finally, about forty minutes out of Inuvik, the temperature became critical and the accumulator burst open with an explosive blast that shook the rear of the plane. The airframe was strong enough to withstand the detonation, but the flames from the burning fluid greedily found more fuel in the plastic sheaths around the wires, the ducting within which the circuits were bundled, the cladding around the air pipes-all manner of combustible materials.

The crew barely felt or heard the explosion over the juddering of air turbulence and roaring of the jets. The first thing the pilot knew for sure was the warning light telling him that fire had taken hold in the rear equipment bay. The second was that there was nothing whatever he could do to put it out. From this point he had a maximum of seven to eight minutes before the flames ate through the control systems for his rudder and elevators.

The moment McCabe’s jet left the ground, Carver got into the three-year-old Ford F-250 heavy-duty truck he’d bought for cash two weeks ago in Skagway, Alaska, and headed to the nearest gas station. In the restroom, he shaved off Steve Lundin’s beard and took off his overalls, which he dumped in a trash can out back. Then he turned south, onto the Dempster Highway. A short while down the road, the asphalt ran out. For the next 450 miles, crossing one Arctic Circle, two time zones, five rivers, and several mountain ranges, he’d be on nothing but rough shale and gravel.

They told you this kind of thing in Inuvit, the sheer, overwhelming scale of the local geography and the incredible absence of other people being the region’s proudest features. The Yukon Territory alone was almost as big as Spain, but had just thirty thousand people in it. But the Northwest Territories, next door, made Yukon look as impressive as a suburban backyard. Its forty thousand inhabitants were spread across an area bigger than Spain, France, Holland, Belgium, and England put together.