In this photo provided by CBS, talk show host Keith Olbermann, left, chats with host David Letterman on the set of the “Late Show with David Letterman,” Tuesday April 3, 2012 in New York. (AP Photo/CBS, Jeffrey R. Staab)
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In this photo provided by CBS, talk show host Keith Olbermann, left, chats with host David Letterman on the set of the “Late Show with David Letterman,” Tuesday April 3, 2012 in New York. (AP Photo/CBS, Jeffrey R. Staab)
