Andy Borowitz fills in for Leonard Lopate. On today’s show: industrial hygienist and chemist Monona Rossol and Miranda Massie discuss the threat posed by PCBs in New York schools. Ralph Branca, best known for throwing the pitch that resulted in the “shot heard 'round the world,” looks back on his remarkable life in baseball. WQXR’s Elliott Forrest tells us about the funny side of classical music. And this week’s Please Explain is all about what happens every year at the UN General Assembly.