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David Letterman chokes up Kimmel, others
Late night comedians are honoring David Letterman as he retires from "Late Show."
01:24
- Source:
CNN
David Letterman
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Top moments from David Letterman finale
01:54
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- Source:
CBS
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Paul Shaffer on Letterman friendship, Late Show career
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Conan and Kimmel on Letterman's tremendous influence