At Joint Base Andrews where Donald Trump rolled out the red carpet for the visiting Chinese president, Xi Jinping appeared unfazed during a ceremonial flyover by a screeching US bomber while the US president visibly winced at the noise. As Xi arrived at the military base just outside Washington on Thursday, he was greeted with a ceremony that included the US Air Force band playing the American and Chinese national anthems, a 21-gun salute, a guard of honour, a display of six F-16 and six F-22...