News brief
A clash over the Group of 20 gathering of major world economies in Johannesburg continued on the eve of the event, as the Trump administration walked back a pledge to boycott. It will now send a low-level delegation to Sunday鈥檚 closing ceremony, where Pretoria will hand off the G20 presidency to Washington. But the U.S. will not participate in talks, which will foreground issues facing the developing world, such as climate change and ballooning sovereign debt.
