David Letterman Retiring After 33 Years As Late Night Host

David Letterman is retiring in 2015 after 33 years as a late night host. Letterman announced the news during a taping of Thursday's episode of "Late Show." He called CBS president Leslie Moonves before the program, "And I said 'Leslie, it's been great, you've been great, and the network has been great, but I'm retiring.'" The late night host explained that "Moonves, he and I have had a relationship for years and years and years, and we have had this conversation in the past, and we agreed that w...