Atmospheric ice crystal displays viewed from 16,300' Balcony Camp on the West Rib of Denali. The parhelic circle (through the sun), the 22 halo and the 46 halo (around the sun) and a pair of bright parhelia or sun dogs (on either side). All of this is pierced through the middle by a contrail from a commercial jet. The mountain in the lower left is Mt. Foraker. Denali National Park, Alaska. May 2006