To some, slacklining, along with its cousin highlining, is nothing more than an extreme and dangerous sport. But to Sonya Iverson, a geneticist by training, slacklining is a passion and a path to overcoming more than just a fear of heights. In part one of this two-part story, hear Sonya explain the sport of slacklining and how it has helped her succeed in life beyond the strip of webbing.