Day for night: Couric, Leno to make swap

Katie Couric making jokes about the news she reports? Jay Leno forced to interview the politicians he mocks?

Those intriguing possibilities become real May 12. The two NBC personalities have agreed to switch jobs for a day -- Couric will be host of "The Tonight Show" and Leno will be host of "Today."

Leno, who hasn't let anyone else be a "Tonight" guest host since taking over from Johnny Carson in 1992, said it was Couric's idea.

From Associated Press