In Radio City Music Hall, the years do not flow back into the past.  They gather invisibly around you.  Each Christmas the Rockettes dance into our memories.  Doris Carie was a Rockette at 17, the youngest girl in the line.  They lived in the theater from 8 in the morning until 11 at night.  After a year, she was sore all over.  She went home to Georgia, but she never forgot the lessons.