It's official. The Al Gore-founded cable news channel Current TV has been sold to Al Jazeera. The purchase gives Al Jazeera the opportunity to establish a bigger presence here in the United States. 

But it also marks the end of what was once thought to be a bold experiment in a new approach to television programming. For more on the short life, and death of Current TV we're joined now by Brian Stelter, who broke the story for the New York Times.