Human to Hero next meets Guor Mading Maker
, a marathon runner from South Sudan.
In 1994, he fled to the U.S. from a refugee camp during the Sudanese civil war, having lost 28 family members including eight siblings.
At the London 2012 Olympics, he competed as an independent athlete. "If I ran for Sudan, I would be betraying my people," he said. "I would be dishonoring the two million people who died for our freedom."