you help us all live better. nationwide insurance is proud to join tavis is working to improve financial literacy and working for economic empowerment. nationwide is on your side. and by contributions to your pbs station from viewers like you. thank you. please to welcome peter yarrow and noel paul stookey. the legendary musicians made up two thirds of the peter paul and mary. next year will mark 50 years since they burst on the music scene with the most iconic songs of the entire generation. the latest project is the new book, book for chirp, called the night before christmas. it includes a companion c.d. from the project. here they are performing. tavis: chatting during that clip. can you believe how mary was? what that spirit was. every time i see it, it comes back so powerfully. such a force. tavis: where does the music go without mary? well first mary stays with it. she s here. and she s not here. she s profoundly her legacy and her presence is is so im