At the first in-person 'Quad' meeting, leaders from the U.S., Japan, India, and Australia stressed the importance of a "free and open" Indo-Pacific.
At the White House on Friday, U.S. President Joe Biden said he was proud to say they are making progress on their commitments to advance their "shared and positive" agenda for a free and open Indo-Pacific.
The U.S. has been working with its allies and partners to curb the rise of China.
The four countries have agreed to enhance cooperation on COVID-19 vaccines, the climate, supply chains, technology, and space.
They also launched a 'Quad fellowship' that allows students from each country to pursue advanced degrees in science and technology programs in the U.S.