Quad navies gather for drills as Australia courts India on trade

SYDNEY -- The navies of the U.S., Japan, India and Australia are converging for drills on Thursday, in another step toward cementing their Quadrilateral Security Dialogue alliance.

Recent overtures from Canberra to New Delhi about also deepening trade and economic ties, however, may prove more complicated than the coordinated military maneuvers. Some experts say the future of economic cooperation could have implications for the Quad's credibility.