CHICAGO, ILLINOIS – MARCH 12: A worker staffs a security checkpoint in the international terminal at O’Hare Airport which is nearly devoid of travelers on March 12, 2020 in Chicago, Illinois. Yesterday President Donald Trump announced a travel ban for European travelers coming into the U.S. for the next 30 days in an attempt to stem the proliferation of the COVID-19 pandemic. (Photo by Scott Olson/Getty Images)