Description: A Royal Canadian Air Force pilot while flying at an altitude of about 11 km saw and photographed a very bright, disc-like object that was remaining stationary near a thunderhead. An analysis of the photograph suggests that it would have been radiating in excess of a gigawatt of power within the spectral range of the film. At about 7:20 PM, MDT (about 20 minutes before sunset), on Aug. 27, 1956 a Royal Canadian Air Force pilot was flying nearly due west over the Canadian Rockies near Ft. MacCleod, Alberta (49.5 degrees latitude, 113.5 degree longitude).