The Great American Clean Up, the nation’s largest community improvement project, is taking place today in several places, including Springfield Massachusetts. Hundreds of volunteers will pick up trash and small debris in parks, school yards and other public ways. One of the organizers is Mike Cass, an employee in the city’s Office of Housing. His specialty is graffiti removal. Cass is so good at it that his official business card identifies him as “The Eraser.” Cass spoke with WAMC’s Paul Tuthill.