Woodstock 1969 was a sort of Critical Mass of the Counterculture, when 500,000 people converged on a bucolic field in Upstate New York for three days of Peace, Love and Music. Henry Diltz witnessed it all up close, and shares his story with host Julian Simmons -- one of the 500,000 young people attracted to the event when he was just 15. (Julian never made it -- he was stuck in the historic traffic jam on the New York State Thruway).