Fiona the hippo over the years

Leonel Contreras, left, and Mauricio Hernandez Mata were allowed to return to the U.S. and became citizens Wednesday.

Ukrainian President Volodymyr Zelenskyy made a surprise visit to the UK on Wednesday to push the case for fighter jets.

A young boy smiles after being rescued by the White Helmets in Idlib, Syria.

700 pounds of acorns were found stuffed by woodpeckers inside the walls of a California home.