** PROGRAM CHANGE **

GABRIELLE GIFFORDS' HUSBAND, CAPT. MARK KELLY, OPENS UP TO DIANE SAWYER IN HIS FIRST TELEVISION INTERVIEW SINCE THE TRAGIC SHOOTINGS IN TUCSON

The Exclusive Interview to Air During a Special Edition of "20/20" with Diane Sawyer, "The Congresswoman and the Astronaut: An American Story of Love and Strength," Tuesday, January 18 on ABC

In his first interview since the tragic shootings at the Safeway in Tucson, Arizona, Capt. Mark Kelly sits down one-on-one with Diane Sawyer to offer an intimate portrait of a modern American love story, and to talk about a great national tragedy and finding the strength to heal. Their emotional conversation took place one week after the tragic shooting.

Note: This program replaces "DETROIT 1-8-7: Road to Nowhere," which moves to Tuesday, February 1 (10:01-11:00 p.m., ET).

She is the political centrist who likes to ride motorcycles. He is the NASA astronaut set to command space shuttle Endeavour's final mission this April. The two met in China, and their first date was not a typical one � a trip to an Arizona State Prison; she was working on legislation about capital punishment. Now, their relationship has captured the hearts of America. For the first time, Capt. Mark Kelly opens up to Diane Sawyer about the moment he heard the tragic news, the emotional bed-side vigil he has kept since, and how the nation's outpouring of support has impacted them. In addition, Sawyer gets insight into the dynamics of the couple from friends and loved ones who know them best.

The exclusive interview will air during a special edition of "20/20" with Diane Sawyer, "The Congresswoman and the Astronaut: An American Story of Love and Strength," TUESDAY, JANUARY 18 from 10:01-11:00 p.m., ET on the ABC Television Network. Portions of the interview will first air Tuesday on "Good Morning America," "World News with Diane Sawyer," and will continue later that evening on "Nightline," with additional coverage from ABCNews.com, ABC News Radio, ABC News NOW and ABC NewsOne, the network's affiliate news service.