A1LY Plumbing Newswire - CBSThisMorning: Tonight David Letterman marks a TV milestone at the Ed Sullivan theater: 30 years as a late-night television host! Kudos Dave! @Late

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CBSThisMorning: Tonight David Letterman marks a TV milestone at the Ed Sullivan theater: 30 years as a late-night television host! Kudos Dave! @Late_Show

CBSThisMorning: Tonight David Letterman marks a TV milestone at the Ed Sullivan theater: 30 years as a late-night television host! Kudos Dave! @Late_Show

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