While Salva is in New York, he is able to attend college. He didn't finish all of his education because of the war in Sudan. He left school because there was guns being fired, and he never returned.
When Salva is in New York, he finds something very important. He finds out his dad is alive and some of his family. When he figures this out he is flying to Uganda to visit his father, who is in the hospital.
Salva and Nya meet while Salva is in Sudan. Salva's idea was to create a well in Sudan because people get sick from drinking the dirty water. Nya walked over to Salva, who was from the Dinka tribe, and they talked for a little while.