One June evening a few years back found us at the site of Chief Joseph's surrender, just beyond the northern slopes of the Bear Paw Mountains. A thunderstorm was tailing off in a cloud-laden sky. On the western horizon, a widening gap revealed a setting sun.

As a prelude to an unfolding concert the elements and the heavens merged. As pastel hues of crimson tinted the breaking clouds, the sun slowly disappeared from sight. Just when we thought the drama was complete, the pinks intensified and began to blend with shades of purple, blue, orange and red. Soon a burning sky in all directions ba...