As a young man, Robert Guilleman was a well-known artist; his work was shown in galleries and museums around the world. But he wanted more. “I wanted to get people involved in art,” he decided. Now called Sidewalk Sam, he uses his artistic talents to create sidewalk masterpieces that bring people from all walks of life together –and even transformed Boston’s busiest highway into a field of flowers. Recently confined to a wheelchair he continues his community art saying, “I have to fulfill my humanity … to make my life worthwhile … to serve my fellow man.”