Two decades ago, a few of my newly graduated from college friends and I walked across the border from El Paso, Texas to Juarez, Mexico, hopped a train through Copper Canyon and boarded a ferry to La Paz, Baja California Sur. Awaiting our crew was a retired Navy Seal, John, who broke his back rappelling out of a helicopter during a training exercise 10 years earlier. He was living on a lifetime training in San Jose del Cabo, the more charming half...