Police officers patrol the campsite on the second day of the Glastonbury Festival of Contemporary Performing Arts near Glastonbury, southwest England, on June 27, 2013. The festival attracts 170,000 party-goers to the dairy farm in Somerset, and this year&#39;s tickets sold out within two hours of going on sale. The Rolling Stones will perform at the festival for the first time, headlining on Saturday night.