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A music fan at Woodstock pop festival in his car covered in anti-war slogans for love and peace. (Photo by Three Lions/Getty Images)

A music fan at Woodstock pop festival in his car covered in anti-war slogans for love and peace.   (Photo by Three Lions/Getty Images)

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August 1969: A man walking past a car notices the feet sticking out of the window during the Woodstock Music And Arts Fair. (Photo by Three Lions/Getty Images)

August 1969:  A man walking past a car notices the feet sticking out of the window during the Woodstock Music And Arts Fair.  (Photo by Three Lions/Getty Images)

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August 1969: Pat McLean from Brighton Massachusetts, hangs her head as she waits beside a car at the Woodstock music festival. (Photo by Three Lions/Getty Images)

August 1969:  Pat McLean from Brighton Massachusetts, hangs her head as she waits beside a car at the Woodstock music festival.  (Photo by Three Lions/Getty Images)

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Torrential rain and thick mud at the Woodstock music festival result in some people removing their shoes to allow them to dry. (Photo by Three Lions/Getty Images)

Torrential rain and thick mud at the Woodstock music festival result in some people removing their shoes to allow them to dry.   (Photo by Three Lions/Getty Images)

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August 1969: A group of people listening to the music at the Woodstock Music and Arts Fair and enjoying the relaxing atmosphere. (Photo by Three Lions/Getty Images)

August 1969:  A group of people listening to the music at the Woodstock Music and Arts Fair and enjoying the relaxing atmosphere.  (Photo by Three Lions/Getty Images)