Swiss tightrope walker Freddy Nock walks on the carrying cable of the Corvatsch Cable Car downwards from the Corvatsch mountain station on 3,303 meters above sea level, near Silvaplana, eastern Switzerland, on Wednesday, Aug. 24, 2011. Nock is attempting to set a new world record by doing seven summits in Germany, Austria and Switzerland in seven days. (AP Photo/Keystone/Arno Balzarini) - GERMANY OUT - AUSTRIA OUT -