Maria Shriver appears with Oprah Winfrey during a star-studded double-taping of "Surprise Oprah! A Farewell Spectacular," Tuesday, May 17, 2011, in Chicago. "The Oprah Winfrey Show" is ending its run May 25, after 25 years, and millions of her fans around the globe are waiting to see how she will close out a show that spawned a media empire. (AP Photo/Charles Rex Arbogast)
Maria Shriver appears with Oprah Winfrey during a star-studded double-taping of "Surprise Oprah! A Farewell Spectacular," Tuesday, May 17, 2011, in Chicago. "The Oprah Winfrey Show" is ending its run May 25, after 25 years, and millions of her fans around the globe are waiting to see how she will close out a show that spawned a media empire. (AP Photo/Charles Rex Arbogast) ASSOCIATED PRESS
Maria Shriver appears with Oprah Winfrey during a star-studded double-taping of "Surprise Oprah! A Farewell Spectacular," Tuesday, May 17, 2011, in Chicago. "The Oprah Winfrey Show" is ending its run May 25, after 25 years, and millions of her fans around the globe are waiting to see how she will close out a show that spawned a media empire. (AP Photo/Charles Rex Arbogast) ASSOCIATED PRESS

Commentary: Oprah's role in changing public discourse

May 22, 2011 12:00 AM

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