It's Labor Day! Some mark it as the end of summer, or the opportunity for big sales, but the labor movement can be credited for your five-day work weeks and paid vacation days.

To hear how Labor Day started and how far we've come since then, KCBS Radio News anchor Ted Ramey was joined by Edward Yedlin, Emeritus Professor at UCSF and Senior Researcher at the Interdisciplinary Center for Healthy Workplaces at UC Berkeley.