Jimmy Fallon’s Heartfelt Goodbye to David Letterman

Jimmy Fallon known for his ability to make us laugh, got a little emotional as he paid tribute to one of the greatest talk show hosts of our time, David Letterman.

Letterman has been the host of first "Late Night" on NBC and then "Late Show" on CBS for a total of 33 years and now after an incredible career, has decided to retire. Here is what Jimmy had to say about his friend:

Jimmy starts by pulling out a prophetic photo from his 8th grade year book where his teacher predicted that when he grew up he would take over for David Letterman. Ultimately Jimmy did take over "The Late Show" when Conan O'Brien vacated the spot, and said he would like to go to the racetrack with that teacher.

"He's always just there when you need him," he said. "I remember after 9/11, we needed somebody. The city was in shock. We're all looking for answers. We wanted to see what Dave had to say, and we looked at him to say something."

Fallon added, "He said ... 'There is only one requirement for any of us and that is to be courageous, because courage, as you might know, defines all other human behavior.' ... We needed that [after 9/11]. David Letterman is courageous. Have a nice retirement Dave."