In December 1992, I picked up the latest issue of National Geographic magazine to do some light reading before bed. The cover article, by Michael Parfitt, profiled Highway 93—one of the toughest two-lane roads in North America.1 I was a new mother back then, with seventeen- and six-month-old babies, born back-to-back. Between frequent feedings and diaper changes, most of the time I functioned in a sleep-deprived daze. My fuzzy mind had trouble absorbing much more than a magazine article now and then. I remember looking forward to sinking into that magazine.