Philippines, Australia start sea, air patrols in South China Sea

The Philippines and Australia began their first joint sea and air patrols in the South China Sea, joining the U.S. in efforts to counter China's aggressive activities. China claims almost the entire South China Sea, but the Permanent Court of Arbitration in 2016 ruled against China's claims. The joint patrols by the Philippines and Australia aim to underscore their commitment to a rules-based order. The patrols will take place in the West Philippine Sea.