Peniel Joseph recalls the black power movement in his book, Dark Days, Bright Nights: From Black Power to Barack Obama.  Mr. Joseph contends that the 1965 Voting Rights Act played a significant role in the ascendancy of black radical politics and assisted in paving the way for future African-American political leadership.  Peniel Joseph profiles several of the movement's key figures, including Stokely Carmichael, Malcolm X, and Paul Robeson.  He discussed his book with Kevin Merida, national editor of The Washington Post.