Mrs. Blanco has always known she had a smile, sensed it even before she became aware of it. When nothing else would do, her education, her figure, her presence, that simple pull at the ends of her lips speaks with a language of its own. This morning she knows she’s going to need it. So sure she is, in fact, that after brushing her teeth, she restrains herself from beaming at the mirror to preserve her smile’s full strength.