FILE - In this March 20, 2020 file photo, Palmcroft Elementary School students in Jennifer Hartley's second-grade class are seen on the computer screen during an instructional session via the Internet in Yuma, Ariz. Reaction to the coronavirus, change came to the United States during the third week of March in 2020. It did not come immediately, though it came quite quickly. There was no explosion, no invasion other than a microscopic one that nobody could see. (Randy Hoef…

March 21, 2020