As Chief Official White House Photographer under President Obama, Pete Souza had a front-row seat to history for eight years -- and he let us in on that history by snapping nearly 2 million photos. In this episode, the author of "Obama: An Intimate Portrait" talks about growing up in Dartmouth, Mass.; his backstage pass to moments that defined America; why he thinks Obama will make a good grandfather; and why -- despite the thrill of the job -- he's happy that it's over.