The photos
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Bishorn 4135m: Nicola Castagna and Gabriel Perenzoni
© Nicola Castagna, Gabriel Perenzoni
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Allalinhorn Nicola Castagna and Gabriel Perenzoni
© Nicola Castagna, Gabriel Perenzoni
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Strahlhorn summit: Nicola Castagna and Gabriel Perenzoni
© Nicola Castagna, Gabriel Perenzoni
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Strahlhorn: Nicola Castagna and Gabriel Perenzoni skinning up, with splendid view onto the Matterhorn
© Nicola Castagna, Gabriel Perenzoni
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Rimpfischhorn summit: Nicola Castagna and Gabriel Perenzoni
© Nicola Castagna, Gabriel Perenzoni