Dan Konzelman was driving with his girlfriend southbound on Interstate 5, south of Tacoma, Washington, Monday morning when, to his astonishment, he saw an Amtrak train go off an overpass ahead of him and crash onto the busy freeway. While most of the stunned onlookers in nearby automobiles stayed in place, no doubt making 9-1-1 calls for help, Konzelman – an Eagle Scout – took a nearby exit and ran to the scene. He and his girlfriend, Alicia Hoverson, found that first-responders had not yet arrived. The two climbed into one of the train cars, noting only a few of...