BOSTON --In April 1976, Ted Landsmark was walking near City Hall when he stumbled into an antibusing demonstration. The photo of a white man using an American flag to spear Landsmark, who is black, won a Pulitzer Prize and branded Boston as racially intolerant. Thirty years later, Landsmark is president of the Boston Architectural College. And he watches with great interest as another black man, Deval Patrick, runs neck-and-neck with his opponents in the Democratic gubernatorial race. The question is whether Massachusetts voters today are ready to elect their first black governor. The Democratic primary is Sept. 19. The general...