WATERFORD, Pa. - Jill Biden sees a teachable moment in the depths of the coronavirus pandemic. The first lady sat in a socially distanced circle in the library at Fort LeBoeuf Middle School in Pennsylvania, listening and taking notes as parents expressed relief that the school had reopened and their kids were back in the classroom. A teacher herself, Biden praised the small circle of parents, teachers and administrators for working together to help reopen Fort LeBoeuf. And she repeated a message she had delivered earlier that day while visiting Benjamin Franklin Elementary School in Meriden, Connecticut. The first lady...