This week on his show, The Late Show, late night TV host and icon David Letterman addressed the news of Robin Williams' death by suicide, revealing that he and the comedic superstar were good friends for 38 years. In this touching tribute to Williams, Letterman holds back tears while talking about his friend, making sure that we all knew just how amazing the talent was and how much he'll be missed. Watch Letterman's speech right here and see if you can manage not to cry. Read More »