As I'm sure you know, David Letterman is retiring. This is his final week as the host of "Late Night."
In order to send off the late-night luminary, Jimmy Fallon provided a fitting tribute to Dave.
In his little speech, Fallon praised Letterman's sense of humor and his willingness to be goofy. Fallon also got a little emotional when he spoke about David's response to 9/11.
It'll be sad to see Letterman go, but it's great to know he left such a lasting impact on those around him.
Check out Fallon's take above.