In this image released by CBS, David Letterman appears during a taping of his final "Late Show with David Letterman," May 20, 2015 at the Ed Sullivan Theater in New York. Jeffrey R. Staab AP
In this image released by CBS, David Letterman appears during a taping of his final "Late Show with David Letterman," May 20, 2015 at the Ed Sullivan Theater in New York. Jeffrey R. Staab AP

David Letterman signs off after 6,028 late-night shows

May 20, 2015 01:20 PM