Yesterday, Dmitry Grekov of Ak-Sai Travel announced an unusual first on 7,010m Khan Tengri. One of Grekov’s clients, Siegfried Meesters, had reached the summit supported by Nepali guide Dawa Sherpa. The first? Meesters had used supplementary O2. Rather than concealing the use of bottled oxygen, as some climbers might, Grekov publicized it. He explained to … Continue reading Bottled O2 Goes Global on Khan Tengri and Aconcagua