The children of South Sudan's war face hunger, rape and other violence on their long, often-solitary walks to safety

Obede Lutana lost both his parents in South Sudan’s increasingly vicious civil war—his father shot to death by soldiers last year on the family’s farm near Yei, his mother killed in an outbreak of disease.

Lutana was left to live with his cousin, a young woman who cared for him as the chaos escalated...