K2 is «only» the second-highest mountain on earth. This fact, however, doesn’t lessen his attraction: the huge sugar-loaf mountain with its clear lines, ruler over the confusing world of glaciers of the Karakorum range, is said to be the «mountain of mountains», the most beautiful and most challenging 8000m peak. When on 31 July 1954 Achille Compagnoni and Lino Lacedelli summitted K2 at 6 p.m., a milestone in Italian mountaineering was set. We will follow their route over the Abruzzi Spur which is named after the legendary Duke of the Abruzzi.