John Lindsay’s tumultuous two terms as mayor of New York City were marked by strikes, racial divisions and fiscal problems.  And more than 40 years later, his legacy remains as mixed as ever.  On this week's Cityscape, we look back on the Lindsay era.  Our guests include New York Times Urban Affairs Correspondent, Sam Roberts and Tom Casciato, the Executive Producer of a new public television documentary called Fun City Revisited: The Lindsay Years.