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Swiss Samuel Volery, professional mountaineer, walks on the 585 meter line during the Highline Extreme event on the top of the Moleson peak at 2000 meters above the sea level, in the Swiss Alps, near Fribourg, Switzerland, Thursday, September 8, 2016. 25 of the European best slackliners compete until September 11, on 8 different lines ranging from 45 metres to 495 metres. Balancing on the "slackline" is a training method for climbers to improve their equilibrium sense. To avoid the danger of falling down, the athlete is secured with a rope. (KEYSTONE/Laurent Gillieron)..