'Contenders' looks at ground-breaking presidential candidates from the past

In Contenders, a five-part series concluding on today's All Things Considered, producers Joe Richman and Samara Freeman profile some of the most unconventional, and interesting, presidential candidates in American history. Tonight's installment recalls the 1972 campaign of Shirley Chisholm, the first black woman to seek the Democratic party nomination. Links to pieces that aired earlier this week, as well as other Radio Diaries documentaries for NPR, are here.