Biden arrived along with Canadian Prime Minister Justin Trudeau after photographers had already finished with the other smiling leaders, who had been positioned on a riser. A senior Biden official said the president did not participate because of "logistical issues."
The G20 summit in Rio aims to build consensus on taxing the super-rich for climate action and poverty relief. But as geopolitical issues take priority, President Lula may struggle to quell skepticism over the proposal.
