Quad summit: The China factor at the heart of the meeting

MAY 24: The group - composed of Japan, the US, Australia and India - seems to be emerging from the shadows of the Covid-19 pandemic and, to some degree, from Russia's invasion of Ukraine as well.

The top leaders are gathering for the fourth time - they have already met once in Washington last September and twice virtually - in less than two years. That underscores the importance of the Quad, which was largely just a concept until 2017.