Despite being blind since birth, Michael Hingson biked, worked out advanced math problems in his head, and worked at several high tech companies for over 30 years. Our guest’s life, like many of ours, changed on September 11th. He was on the 78th floor of Tower One during the attack and managed to escape with the help of his guide dog moments before the tower collapsed. He went on to serve at multiple nonprofit organizations aimed at training guide dogs and helping blind students live out their dreams. His book Thunder Dog captures his journey and has sold over 2.5 million copies.