? ? Our "Instant index," begins in Rome. Pope Francis and the queen of England, meeting for the first time today. The pope gave the great-grandma a baby gift for prince George. An orb of semiprecious... See More
? ? Our "Instant index," begins in Rome. Pope Francis and the queen of England, meeting for the first time today. The pope gave the great-grandma a baby gift for prince George. An orb of semiprecious stones. The queen joking, he'll be thrilled when he's a bit older. And the queen gave the pope a basket of british treats, including whiskey. Pope Francis, the fifth pope the queen has met. The first one, she kept waiting for 20 minutes while she talked to the president of Italy. And we have big news from our friend, David Letterman, tonight, who made a call to his big boss, less moonves, today. I said, Leslie, it's been great. You've been great. The network has been great. But I'm retiring. Really? Yep. This is -- you actually did this? Yes, I did. Wow. But some time in the not-too-distant future. 2015, for the love of god, in fact, Paul and I will be wrapping things up and taking a hike. And with that, a standing ovation from his audience. This will end Letterman's 21-year run of "The Late Show" desk. The fast and brilliantly funny guy with the gap-tooth smile started out as a weatherman. And turning top ten lists, stupid human tricks, even his mom, Dorothy, into cult classics. Our jimmy Kimmel says this, Letterman is the best there is and ever was. There's only one Dave.
This transcript has been automatically generated and may not be 100% accurate.