She noticed that she was casting a shadow on the pavement ahead of her. This made no sense. The sun was down. The moon was off to her left, low above the mountainous spur that framed the other side of the valley. In other words, it was in the wrong place, and in any case not bright enough, to cast her shadow there. Someone must be shining a light on them from behind. But she hadn’t heard anyone approaching. A drone, perhaps? Maybe some nervous Black Hat had decided to shadow them and make sure they didn’t wander off into the desert to be eaten by pigs. Somewhat annoyed, she stopped walking and turned around. Jules was already doing likewise. The source of the light was blindingly obvious in a quite literal sense—she couldn’t look right at it. It was moving across the sky, shortening her shadow. Who flew drones with such powerful lights on them?