Sunrise at Everest, taken in Kala Patthar of Nepal (5550m); with only 50% of sea level Oxygen, it was a difficult hike to get there. The weather in the region is either too cloudy (summer) or clear sky (winter). It has to be in a changing season in order to observe thin cloud, but one would easily risk not seeing Everest at all. The halo was a bonus appeared only a few seconds when the clouds were retreating from the heat of rising sun. A Very rare combination may only see once in a lifetime.