Obama took a tour of the Great Wall of China and said, 'We need one of these things around the White House.'
David LettermanScientists have discovered a black hole that is 12 billion times the size of our sun. It's full of Hillary Clinton emails.
David LettermanTourists - have some fun with New york's hard-boiled cabbies. When you get to your destination, say to your driver, "Pay? I was hitchhiking."
David Letterman