Joan Baez has long been recognized for her soulful voice. But at 77, she is also being recognized for another talent: painting. Last fall acrylic portraits by her were shown in an exhibition at the Seager/Gray Gallery in Mill Valley, Calif. Titled "Mischief Makers," the show featured Baez's depictions of activists, civil rights leaders, artists and others who have fought oppression and injustice. In this extended transcript, "Sunday Morning" correspondent John Blackstone toured the exhibit with Baez, who discussed her history with many of her subjects and their propensity for causing mischief, as well as her own history in that area.