Airs Monday August 17th at 8PM on HISTORY. In the summer of 1969, on a farm about 90 miles north of New York City, more than 500,000 people gathered for a three day music festival that in an instant, defined a generation and changed popular culture forever...Woodstock. This special explores the frenzied days leading up to and throughout the festival, from how the planners scrambled to find a concert site and the traffic jams that shut down the New York State thruway to the infamously bad "brown acid," the thunderous rain and mud and, of course, the music. Become a fan of History on Facebook http://facebook.com/history and follow us on Twitter http://twitter.com/history_daily