The return of the 737 MAX, Boeing's best-selling model, is the latest sign of disruption to new aircraft deliveries from a breakdown in the aerospace industry's decades-old duty-free status.

Reporters ask President Trump about the status of his negotiations with China and, in particular, whether he has spoken to Chinese President Xi Jinping amid the ongoing trade war.

Trump tariffs in 2016 sent a glut of cheap Chinese imports, originally intended for the US, into South East Asia, hurting many local manufacturers. But they also opened new doors for other businesses, often into global supply chains that wanted to cut their dependence on China.