G20 leaders vowed to avoid tit-for-tat currency devaluations, but China's strong objections to any brakes on its export machine undermined a US push to redress skewed global trade.
G20 leaders began a second day of talks on resolving bitter trade and currency disputes with the host South Korea saying it expected some sort of agreement to be reached.
US aerospace giant Boeing halted test flights on its new 787 Dreamliner, dealing a fresh setback to a program already running about three years behind schedule.
More than 1,000 tigers have been killed in the past decade to fuel the illegal trade in parts of the endangered big cats, a report by a wildlife monitoring group said.