The leaders of Australia, India, Japan and the United States agreed Saturday to expand cooperation on maritime security, such as through improving the interoperability of their countries' coast guards, in the face of China's relentless assertiveness in the South China Sea and nearby waters.U.S. President Joe Biden, who chose his home state of Delaware to host a summit of the grouping known as the Quad, said they will roll out additional projects designed to have a "real positive impact" on the Indo-Pacific.In a joint statement, the leaders outlined new and ongoing initiatives in areas rangi…READ FULL ARTICLE