Only on the "CBS This Morning" podcast, violinist and social justice advocate Vijay Gupta joins CBS News correspondent DeMarco Morgan to discuss the power of music and how it saved his life. A 2018 MacArthur Genius Grant Fellow, Gupta started performing at 5 years old and would go on to becoming the youngest violinist at the Los Angeles Philharmonic. He discusses what motivated him to perform for the homeless and mentally ill on Skid Row through his not-for-profit "Street Symphony."