Guest host Michael Cerveris presents stories that celebrate the distinguished O.Henry Awards. Three prize-winning stories are featured: In “Midrash on Happiness,” by Grace Paley, a woman wants it all. The reader is Mia Dillon. And a woman who’s lost it all must get an exit visa in “The American Embassy,” by Chimamanda Ngozi Adichie, read by Karen Pittman. A son is puzzled by his father’s strange habit in Jerome Weidman’s “My Father Sits in the Dark,” read by Josh Hamilton.