U.S. carrier group patrols in tense South China Sea | 18 Feb 2017 | A United States aircraft carrier strike group has begun patrols in the South China Sea amid growing tension with China over control of the disputed waterway and concerns it could become a flashpoint under the new U.S. administration. China's Foreign Ministry on Wednesday warned Washington against challenging its sovereignty in the South China Sea. The U.S. navy said the force, including Nimitz-class aircraft carrier USS Carl Vinson, began routine operations in the South China Sea on Saturday.