United Airlines: Passengers are our worst enemy. We're not too fond of luggage either.
David LettermanEarlier today, we got a call from Stephen Hawking. He's a genius, and after 6,028 shows he ran the numbers and he said it works out to about eight minutes of laughter.
David LettermanMitt Romney is not going to run for president. Mitt said it's time for fresh faces. So that's good news for Bruce Jenner.
David LettermanThere's only one requirement of any of us, and that is to be courageous. Because courage, as you might know, defines all other human behavior. And, I believe - because I've done a little of this myself - pretending to be courageous is just as good as the real thing.
David Letterman