Jim Gallien had driven four miles out of Fairbanks when he spotted the hitchhiker standing in the snow beside the road, thumb raised high, shivering in the gray Alaska dawn. He didn't appear to be very old: eighteen, maybe nineteen at most. A rifle protruded from the young man's backpack, but he looked friendly enough; a hitchhiker with a Remington semiautomatic isn't the sort of thing that gives motorists pause in the forty-ninth state. Gallien steered his truck onto the shoulder and told the kid to climb in.