ELEVEN
MOUNT RUSHMORE NATIONAL MEMORIAL
BLACK HILLS REGION, SOUTH DAKOTA
IGNORING LIBBY’S DEMANDS to turn back, Sarah vanished from view. Even to Libb, her own voice sounded hysterical. And why not? She was a thousand feet high along a near-vertical conveyor belt of shifting earth, terrified to retreat, terrified to advance. With her only other option a tumble to certain death, advance, Libby did.