On the great windswept plains of South Dakota rises a tower in stark mockery of the flat environment around it. Once that tower, so tall and so sudden, relayed television to viewers in the Mount Rushmore state. Now defunct, it is 1,500 vertical feet of hazard for any aircraft in the area when unlit. Climber Kevin Schmidt went up the tower to change the lightbulbs, and videographers from Prairie Aerial captured the climb with a drone. In high definition.