This the TED talk I did last November. I was coming off a 46 hour marathon trip home from the Blue Nile Gorge in Ethiopia where my son Lucas and my best friend from high school Ken Frantz built a new footbridge over the river. Tim Nisely the organizer literally called me in the jetway as we were  boarding the Ethiopian Air flight to Addis Abba two weeks before to ask me if I wanted to present. It actually sounds better than it did while I was giving it.