This week's guest on Amazing Americans is a man that has redefined the words 'Humanly Possible." Eric Weihenmayer is completely blind, yet he has climbed Mount Everest, plus scaled the highest peaks on the other six continents. And those are only a portion of the accomplishments of this incredible man. He is the author of three books and the subject of four different films. His story of living in complete darkness yet living in pure adventure is an amazing one!