Thirty-seven people from 27 countries became U.S. citizens today during a naturalization ceremony conducted at Pittsburgh Allderdice high school in Squirrel Hill Daudi Hamadi Abdalla, a 2011 Allderdice graduate who was among those naturalized, gave the main address to the several hundred people who attended. His family is from Somalia. He was born in a refugee camp in Kenya. The family came to the United States in 2004. “This is the greatest thing that ever happened to me. It’s been a really long struggle for my family,” said Abdulla, who was naturalized along with his father, Hamadi Mahtula. The naturalization ceremony was arranged by Allderdice, and it had special significance for Abdalla, who said it was “great” to be back at his old school. He’s now a student at the Community College of Allegheny County and hopes to make a career in film and visual arts.