SALISBURY, UNITED KINGDOM - JUNE 21: People prepare for the summer solstice dawn celebrations as druids, pagans and revellers gathered the night before the Summer Solstice sunrise at Stonehenge on June 21, 2015 in Wiltshire, England. Thousands of revellers gather at the 5,000 year old stone circle in Wiltshire to see the sunrise on the Summer Solstice dawn. The solstice sunrise marks the longest day of the year in the Northern Hemisphere. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
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