MINISERIES FINALE: For the second time, because of breaking news and resultant rescheduling, I’ve been premature in describing specific installments of this series. But unless more breaking stories intervene, this is the final installment of The Sixties, and this last installment includes, as it should, one of the defining, and last, iconic events of that decade: the August 1969 three-day music and arts festival known as Woodstock. “The New York State Thruway is closed, man!”