Vanessa O'Brien, John Snorri set record as 12 scale Mt K2 KATHMANDU:A 52-year-old mountaineer has scripted history by becoming the first American-British woman to successfully climb the world’s second highest peak on Friday afternoon. The GPS tracker shows that American climber Vanessa O'Brien stood atop the Mt K2 (8,611 m) a few minutes ago. Kathmandu-based expedition handling agencies also confirmed that 12 climbers including seven Nepali Sherpas scaled the peak this afternoon. With his successful ascent on Mt K2,  John Snorri Sigurjonsson also created a history by becoming the first Icelander to reach the top of world’s second highest peak. Chinese climber Zhang Liang has also completed his 14th mountain above 8,000 m by scaling Mt K2. Mingma also completed his 13th mountain above 8,000 m by scaling Mt K2 in the season. Sherpa had earlier climbed Nanga Parbat, the world’s ninth tallest peak, last month, he added.