David Letterman will host his final show Wednesday night, May 20, 2015. (2014)
David Letterman will host his final show Wednesday night, May 20, 2015. (2014) Courtesy of Jeffrey R. Staab / CBS Washington Post
David Letterman will host his final show Wednesday night, May 20, 2015. (2014) Courtesy of Jeffrey R. Staab / CBS Washington Post