On the agenda at the Quad Leaders Summit is stepped-up security co-operation in the Indian Ocean and progress to track illegal fishing fleets operating in the waters of the Indo-Pacific

President Joe Biden on Saturday is hosting a fourth Quad Leaders Summit with Japanese, Australian and Indian leaders to discuss maritime security and announce a "cancer moonshot" initiative.

They said it would also represent a further shift of emphasis of the Quad's activities to security issues, reflecting growing concerns about China's intentions. Lisa Curtis, an Asia policy expert at the Center for a New American Security, who previously ...