Margo Jefferson on the history of black performers wearing blackface

As a theatrical art form that began in the 19th century, minstrel shows featured white performers wearing blackface to evoke stereotypes. But African-American performers have also worn blackface when taking the stage. In this web exclusive, Pulitzer Prize-winning critic Margo Jefferson talks with "Sunday Morning" contributor and WCBS anchor Maurice DuBois about why black performers felt the need to don a black mask.