One of the business sectors hit hardest by the novel coronavirus pandemic has been air travel. Passenger volume is down a stunning 96 percent in the U.S., while airline losses have topped $300 billion worldwide. Despite canceled flights, travelers are not easily able to get their money back. Meanwhile, pilots and other staff worry for their safety. Economics correspondent Paul Solman reports. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders