Conan O’Brien ended his tenure at “The Tonight Show†last night with a dignified and earnest farewell to his fans. Jimmy Fallon said goodbye to Conan with a trip to his old studio in New York, while David Letterman didn’t lose sight of what was really important: making fun of Jay Leno. Finally, Jimmy Kimmel took a break from the feud to discuss the weather. Watch our compilation to see what you missed.