JOHN ROBERTS: Charles, your pick for 2013, other than Obamacare.
CHARLES KRAUTHAMMER: Look, it has to do, I think, with the remarkable changes in social attitudes -- generally speaking, libertarians. The swiftness with which attitudes have changed on gay marriage is simply astonishing. When you think 20 years ago Democrats were the ones who introduced Don't Ask, Don't Tell, and that is a progressive idea. A Democratic president signed the Defensive of Marriage Act which was essentially abolished this year, to the cheers of Democrats. And the fact that only five years ago, the president said that he opposed gay marriage, because of religious reasons, which of course now he's rejected and he's changed on. That, I think, is an astonishing development. But it isn't only with gay issues, it is also the legalization of marijuana.
ROBERTS: Legal sales begin in Colorado tomorrow morning.
KRAUTHAMMER: Exactly, and a lot of people are hopping on planes and want to get there. Especially a lot of the hippies '60s who dreamed of a day when you could walk into the store. I mean, I'm not associated myself in any way with this.
JONAH GOLDBERG: You just know people.
ROBERTS: What time is your flight for Denver?
KRAUTHAMMER: You remember what they say, if you remember the '60s, you weren't there. Well I was there and don't quite remember it. You walk into a store now in Colorado and you can smoke. But there is one exception here, which I think is the