Theo Krause gains speed as he drops into a ravine on a remote Colorado mountain biking trail. Rounding a bend, his bike hits an awkward bump, hidden by the shadows, that catapults him head first into an aspen tree, splintering his neck. Staring at the sky, paralyzed, he thinks, “This is where I will die.” <br><br> A mountain rescue team races in while a helicopter crew positions for a dangerous airlift. Hours later and five hundred miles away, Theo’s mother takes a phone call. The...