Mischief Reef
On 2 October 2016, USS "John S. McCain" and made the first port visit by U.S. Navy ships to Cam Ranh Bay since end of the Vietnam War in 1975. In August 2017, "John S. McCain" sailed within of Mischief Reef in the South China Sea, exercising a claim to freedom of navigation. China, claiming sovereignty over the reef, expressed its "strong dissatisfaction" in response to the action. A US Navy representative reported that a Chinese frigate had sent at least 10 radio messages warning that the "John S. McCain" was in Chinese waters, to which the US ship replied that it was "conducting routine operations in international waters."