PHOTOS: Charlie Gibson Retires from ABC News; Diane Sawyer to Anchor 'World News' - ABC News

Charles Gibson, anchor of ABC News' 'World News', has announced his retirement from ABC News. Diane Sawyer, co-anchor of "Good Morning America", will anchor the evening news broadcast. Gibson and Sawyer worked together on GMA. ABC News President David Westin made the announcement in an email to ABC News staff, and Charlie Gibson emailed 'World News', telling them of his retirement, effective December. Sawyer takes over the 'World News' anchor chair in January 2010.

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