Holed up in the US: Coronavirus shutdown threatens jobs

People walk in Union Station's Main Hall in Washington, Monday, March 16, 2020. The U.S. surgeon general says the number of coronavirus cases in the United States has reached the level that Italy recorded two weeks ago. It's a sign that infections are expected to rise in America as the government steps up testing and financial markets continue to fall. (AP Photo/Patrick Semansky)

A woman wearing a mask walks through a terminal at Ronald Reagan Washington National Airport, Monday, March 16, 2020, in Arlington, Va. (AP Photo/Andrew Harnik)

The Oculus at the World Trade Center's transportation hub is sparsely occupied, Monday, March 16, 2020 in New York. Millions of Americans have begun their work weeks holed up at home, as the coronavirus pandemic means the entire nation's daily routine has shifted in ways never before seen in U.S. history. (AP Photo/Mark Lennihan)

WASHINGTON — Millions of Americans holed up at home against the coronavirus Monday, with many of them thrown out of work until further notice, as authorities tightened the epic clampdown and the list of businesses forced to close across the U.S. extended to restaurants, bars, gyms and casinos.