David Letterman Crashes 'Tonight Show'

Jimmy Fallon viewers were left surprised earlier this month when The Roots, the show's longtime house band, were noticeably absent.
He invited Letterman to Dublin for his first-ever visit and explained that the band had this new, special album coming. They wanted to tell their story, and they wanted the host to be a part of it ...
The K-Pop band Girls' Generation is the latest Asian group to take on the U.S. market. The WSJ's Min-Jeong Lee tells Deborah Kan why they are gaining ground.