Here’s how they’ve been getting on with the pledges they made at the last summit, in London 5 months ago.
President Obama calls this summit a “check-up”.
Here’s a country-by-country guide to the challenges each of the delegates are facing at home.
So what can we expect this time ?
Well, there’ll be protests definitely, but what else ?
A plan to rebalance the global economy ?
Bankers – and the bonus culture – being brought to heel ?
More stimulus spending ? Do you trust them to help you ? Are you feeling the benefit ? Or do you fear another talking shop ?