A passenger wearing a mask sits at Miami International Airport

A passenger wearing a mask sits next to an airpot information screens as the Federal Aviation Administration (FAA) said it temporarily halted flights arriving at New York City airports and Philadelphia on Saturday after a trainee at the New York Air Route Traffic Control Center tested positive for coronavirus disease (COVID-19), at Miami International Airport, Miami, Florida, U.S., March 21, 2020. REUTERS/Carlos Barria