As a boy, Daniel Majook Gai fled the civil war in Sudan, running miles by himself to safety and leaving his family behind. He was one of the so-called Lost Boys — a name given to children separated from their families during that conflict.
After years in refugee camps in Kenya and Ethiopia, Gai landed in the United States, reunited with his family and got an education. In 2011, he returned home to the newly independent country of South Sudan.
But war came back in 2013 and split the new nation.