Blind Solo Runner

Simon Wheatcroft is an ultramarathon runner who completes hundreds of miles of races, by himself, despite the fact that he is blind.  Most of us will never attempt to run 160 miles, even less will do it solo through the Namibian desert, but only one person is attempting all of that while also being completely blind.  Simon Wheatcroft explains how he finishes the race and what drives him.