NEW DELHI, Sept. 25 -- Dear Italy, yesterday I should have landed in Rome to reunite with my son, who goes to school there. I should have returned home and headed out to the piazza to shop for food. I would have undoubtedly run into a few neighbors and friends on the streets. I'd have said hello, and they'd have said, "welcome back."

It's just that my son, along with millions of kids throughout Italy and elsewhere, doesn't go to school anymore. A few days ago he unexpectedly and urgently returned to America, and shortly thereafter Trump banned travel from Europe, a scornful and already pointless gesture. On the one hand I'm truly relieved my son is back, and that both my children are under the same roof during this time of deep uncertainty...