Activist musicians David Crosby and Graham Nash delivered a touch of Woodstock to Occupy Wall Street protesters in New York on Tuesday. They performed four songs and one 'chant' with the protesters. The duo played for about 20-minutes.

Here they are doing 'Teach Your Children':

As you know, the Occupy protesters really like to do chants...and David and Graham obliged. Here they are chanting 'no more war!' with the crowd:

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