June 24 (Reuters) - Authorities in Macau have locked down several residential buildings as the world's biggest gambling hub tries to contain a rising number of COVID-19 cases that have ground the city to a halt, apart from casinos which mostly remain open.My partner-in-testing Steve Conaway summed it up thusly: "Yellow means you're in heaven, green means good enough and blue means WTF." That said, better...
