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Tourists enjoy the view of the Mammoth Hot Springs at Yellowstone National Park on May 12, 2016. Yellowstone, the first National Park in the US and widely held to be the first national park in the world, is known for its wildlife and its many geothermal features. / AFP / MLADEN ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)

Tourists enjoy the view of the Mammoth Hot Springs at Yellowstone National Park on May 12, 2016. Yellowstone, the first National Park in the US and widely held to be the first national park in the world, is known for its wildlife and its many geothermal features. / AFP / MLADEN ANTONOV (Photo credit should read MLADEN ANTONOV/AFP/Getty Images)
Getty Images

AFP MLADEN ANTONOV