. *]@ightlineh@ab`htlineab`h@news nig "nightline," america in focus. >> good evening. thank you for joining us. we begin with the president's final state of the union address. making the case that he honored the progress made on his watch, addressing key issues like curing cancer, climate change, education. but priority number one, protecting the american people against terror networks and turning an eye towards the future of the country and the future of the white house, here's abc's david wright. >> the president of the united states. >> reporter: the next time we hear the sergeant in arms make that familiar announcement, a different president will be walking into the chamber and glad handing his way down the aisle. last state of the union, his parting shot, at this point he's playing for the history books. >> we live in a time of extraordinary change, change that's reshaping the way we live, the way we work, our planet, our place in the world. >> reporter: that word "change" which served as mantra for candidate barack obama's election all those years ago, tonight to