Peter Yarrow on the Power of Music in Political Movements

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Peter Yarrow of "Peter, Paul and Mary" and Bethany Yarrow, left, perform during a memorial service on Sheridan Circle in Washington, Friday, Sept. 23, 2016, for the late former Chilean Ambassador to t
( Andrew Harnik )
Produced by John Asante and Jack D'Isidoro
Hosted by John Hockenberry
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