Summary: The opening ceremonies of the Olympic Games are just four days away. But the specter of COVID hangs over the games as more than 50 people involved, including athletes, contractors and staff, test positive. Olympics officials say they still hope to put on compelling games despite it all. With that in mind, Judy Woodruff previews some of the Americans to watch with Christine Brennan of USA Today. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
