Have you been following the big oil spill in the Gulf of Mexico? Or as we call it now, the Dead Sea.
David LettermanYou like science? You enjoy science? Always use it for good, never for evil. Can you promise me that?
David LettermanPresident Obama's trying to work out a nuclear deal with Iran, and the Republicans are steamed. They got together and sent Iran a letter about the nuclear deal. They said if this doesn't work, by God, they're going to send Seth Rogen and James Franco.
David LettermanToday is Earth Day. The way I see it, as humans the very least we can do is recycle. A lot of recycling is going on this year. For example, Bushes and Clintons.
David Letterman