K2is taken from the first letter of Karakorum, and the number indicates that it was the second peak in the range to be measured. Achille Compagnoni and Lino Lacedelli, members of an Italian team led by Ardito Desio, reached the summit in 1954.
See E. Viesturs and D. Roberts, K2: Life and Death on the World's Most Dangerous Mountain (2009).
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