A computer screen shows images of Chinese President Xi Jinping, right, and U.S. President Donald Trump as a currency trader works at the foreign exchange dealing room of the KEB Hana Bank headquarters in Seoul, South Korea, Monday, Aug. 26, 2019. Asian shares tumbled Monday after the latest escalation in the U.S.-China trade war renewed uncertainties about global economies, as well as questions over what Trump might say next. (AP Photo/Ahn Young-joon)