The Interpreter

Quad, explained.

Analysts agree that an aggressive China has led to a convergence of threat perceptions across New Delhi, Tokyo, Washington, and Canberra (Dilok Klaisataporn/Getty Images)

Analysts agree that an aggressive China has led to a convergence of threat perceptions across New Delhi, Tokyo, Washington, and Canberra (Dilok Klaisataporn/Getty Images)

What binds the Quad

The four-nation grouping suffered a false start but has proved better connected in its new incarnation.

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