Milwaukee is one of the most segregated cities in the country, and statistically one of the worst for African-Americans. We explore key factors in the city's racial divide ahead of Thursday's Democratic debate.

Despite a historic Supreme Court ruling outlawing segregated schools, today huge numbers of students remain in separate and unequal schools, most in inner cities. Special correspondent Charlayne Hunter-Gault talks with Pedro Noguera of the University of California, Los Angeles, about…

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