Ben Plotkin-Swing stood balancing on a line, just an inch wide, stretched between two towering spires in the North Cascades.
Below much of the line, only thin air stretched for thousands of feet down to the jagged floor of the mountain.
Plotkin-Swing's safety harness was attached to the line. And he’d never been afraid of heights. Still, something happens when you’re standing on a thin strip of polyester webbing far above the ground.