Global
U.S. Navy ship nears 12-mile limit around Chinese islands
The Navy patrol marks the start of a series of challenges to China's territorial claims in one of the world's busiest sea lanes.
The vessel began the journey early on Tuesday local time near Subi and Mischief reefs in the Spratly archipelago, features that were formerly submerged at high tide before China began a massive dredging project to turn them into islands in 2014.
(Reporting by Andrea Shalal; Editing by Sandra Maler)