@CNN: Grand Canyon National Park turned 100 this past week, and this photographer is worried about its preservation. He hiked its entire length — some 750 miles — in an effort to save it. https://t.co/KeUJ52UGKF https://t.co/dmfRuhO61U

@CNN: Grand Canyon National Park turned 100 this past week, and this photographer is worried about its preservation. He hiked its entire length — some 750 miles — in an effort to save it. https://t.co/KeUJ52UGKF https://t.co/dmfRuhO61U