An ABC News joint investigation with its owned television stations sheds new light on the likely flow of the coronavirus from global hotspots into the U.S. and provides a glimpse the toll the virus has taken on some of the first Americans to interact with international travelers: airport workers. From December 2019 through March 2020, as severe outbreaks cropped up in China and then Italy and Spain, among others, thousands of flights from the hard-hit nations poured into U.S. cities, according to an ABC News analysis of more than 20 million flight records obtained from the tracking service Flightradar-24. While...
