On Jan. 19, 2017, Aden Hassan's long wait to start a new life ended when he stepped off a plane in Columbus, Ohio, half a world away from the Kenyan refugee camp where he had lived for a decade.

Years earlier in Mogadishu, Somalia, Hassan's father, a community organizer, was shot dead by the Islamist militants he opposed. A few years later, a younger brother and sister were killed by gunmen while walking home from school. After Hassan's mother survived an assassination attempt, she fled with her surviving children to neighboring Kenya.

The Midwestern winter chill could not dampen Hassan's hope, as he left the airport with his wife, their two young children and his brother, that Ohio would provide a security and stability the family had not known in years. All that remained was for his mother, her second husband, and Hassan's brother and sister to join them, which refugee officials assured him would happen soon.