Participants walk past the effigy of the Man, seen at the center of the 2013 Burning Man arts and music festival in the Black Rock Desert of Nevada

Participants walk past the effigy of the Man, seen at the center of the 2013 Burning Man arts and music festival in the Black Rock Desert of Nevada, August 29, 2013. The federal government issued a permit for 68,000 people from all over the world to gather at the sold out festival, which is celebrating its 27th year, to spend a week in the remote desert cut off from much of the outside world to experience art, music and the unique community that develops. REUTERS/Jim Bourg (UNITED STATES — Tags: SOCIETY) FOR USE WITH BURNING MAN RELATED REPORTING ONLY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO THIRD PARTY SALES. NOT FOR USE BY REUTERS THIRD PARTY DISTRIBUTORS