Ken Gadd, a first-time visitor from Dayton, Ohio, takes pictures of the entrance to Volcanoes National Park, Hawaii, Friday, May 11, 2018. The park is closed due to the threat of an explosive volcanic eruption. Warnings that Hawaii's Kilauea volcano could shoot boulders and ash out of its summit crater are prompting people to rethink their plans to visit the Big Island. (AP Photo/Jae C. Hong)
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