The new CBSN special, "The Power of August," takes a look at key civil rights moments in American history that took place in the month of August, including Emmett Till's murder, the March on Washington and the signing of the Voting Rights Act of 1965. CBS News anchor Maurice DuBois is hosting the special, and he joined CBSN to explore the story ahead of the premiere on tonight at 8 p.m. ET on CBSN.

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