A U.S. warship conducted a patrol Saturday around an island in the South China Sea claimed by China and two of its neighbors, another in a series of operations challenging Beijing’s recent efforts to enforce maritime and territorial claims in the region. As WSJ's Gordon Lubold and Jeremy Page report:

The USS Curtis Wilbur, a destroyer, navigated within 12 nautical miles of Triton Island in the Paracel island chain in the South China Sea, a senior U.S. defense official confirmed. Triton Island is a manned Chinese outpost but is also claimed by Taiwan and Vietnam. Known as a “freedom of navigation operation,” the patrol...