Leaders from Japan, Australia and India met with U.S. President Joe Biden in Washington for the first face-to-face summit of Quad nations. The Quad, short for Quadrilateral Security Dialogue, is an informal alliance of the four countries that was formed after the 2004 Asian Tsunami，but has – especially in recent years – become more of a symbolic opposition to China.

What's on the agenda? And how does AUKUS - the latest pact between Australia, the UK and the U.S. - affect the four-country alliance?

To address these questions and more, we've invited Dr. Xue Chen, research fellow at the Shanghai Institutes for International Studies; Benoit Hardy-Chartrand, professor of political science and international affairs from Temple University in Japan; and Prof. Madhav Nalapat, vice-chair of Manipal Advanced Research Group.