circumhorizontal arcs

A friend sent me these pictures of a beautiful rainbow phenomena that happened here on June 6, 2006. This one was taken Just over the Idaho border:
Here's a link to the other image:
http://www.atoptics.co.uk/halo/chaim8a.htm
This one was taken from downtown Spokane.

It made National Geographic news! You can read more about it here: http://news.nationalgeographic.com/news/2006/06/060619-rainbow-fire.html