For millions of years the sandhill cranes have come through what is now central Nebraska, stopping along the Platte River on their migration north. Families rest and eat for a week or two then move on -- a total upwards of 500,000. They come along with countless other species, all in a flyway's bottleneck pinch in the middle of the Great Plains. Their calls are haunting and deep -- truly ancient. To hear thousands lift from the fields and circle the river at dusk is an experience that lifts one, only for a moment, back into a right relation with the world. We go every year at sunset.