APRIL 28. 1968—THE MUSICAL: HAIR OPENS ON BROADWAY, RUNNING FOR 1,729 PERFORMANCES, SPINNING OFF SEVERAL HIT COVERS OF ITS SOUNDTRACK SONGS (THREE DOG NIGHT’S “EASY TO BE HARD,” THE COWSILLS’ “HAIR,” OLIVER’S “GOOD MORNING STARSHINE” AND 5TH DIMENSION’S “AQUARIUS/LET THE SUNSHINE IN”) AND INSPIRING A MAJOR MOTION PICTURE.