G20 summit has many missing topics

The leaders of the world's twenty largest economies are having one of their regular summits.

Global trade - as ever - will be one of the major topics up for discussion at the gathering - this time in Brisbane, Australia.

For many of them the G20 is the third major summit in a week.

The BBC's chief business correspondent, Linda Yueh, looks at what is on the agenda - and what is not.