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British born singer Graham Nash of US band Crosby, Stills and Nash performs on the main stage during the 35th Paleo Festival, in Nyon, Switzerland, Thursday, July 22, 2010. The Paleo open-air music festival, the largest in Switzerland with 230 000 spectators in six days, runs from 20 to 25 July. (KEYSTONE/Martial Trezzini) *** EDITORIAL USE ONLY, NO SALES ***