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People perform acrobatics during the Surf Art Festival in Athens, Greece, on July 14, 2019. The Surf Art Festival is a three-day festival dedicated to the art of living and surfing. (Xinhua/Panagiotis Moschandreou)

People perform acrobatics during the Surf Art Festival in Athens, Greece, on July 14, 2019. The Surf Art Festival is a three-day festival dedicated to the art of living and surfing. (Xinhua/Panagiotis Moschandreou)