Schools around the nation weigh the safety of students and staff against pressure from parents who can't go back to work with their kids staying home. Part 2 of a 2-part discussion: What do teachers need in the discussion about  re-opening schools? On today's show, Michael Mulgrew, president of the United Federation of Teachers, offers the union's view on how to balance the need to reopen schools against the risks of COVID-19 exposure.