K2 is located on the border of Pakistan and China. Being the second highest mountain in the world, it is thought by many climbers to be the ultimate climbing challenge. The giant Pyramid Peak towers in isolation 12,000 feet above the wide Concordia glacial field at the head of the Baltoro Glacier. The sheer icy summit is flanked by six equally steep ridges. Each of its faces presents a maze of precipices and overhangs. K2 was long considered to be impossible to climb. Attempts in 1902, 1909, 1934, 1938, 1939 and 1953 had all but failed.