'Street medicine' involves delivering medical care to the unsheltered homeless where they live. How effective is this model? What are its challenges and rewards? Host Dr. Michael Greenberg explores the evolving field of street medicine with Dr. Jim Withers, founder of the non-profit street medicine organization Operation Safety Net in Pittsburgh, Pennsylvania. How can addressing the homeless population's medical needs on the streets help lower medical institution costs? What can interested physicians do to get involved with street medicine?