"20/20" - CHRISTMAS AT THE WHITE HOUSE... PRESIDENT BARACK OBAMA AND FIRST LADY MICHELLE OBAMA IN AN EXCLUSIVE JOINT INTERVIEW WITH BARBARA WALTERS

To Air on "20/20" Friday, December 23

Plus: Making A Nine-Year-Old Your Designated Driver; Coming Home - Following Three Soldiers' Emotional Homecoming from the End of the War in Iraq; Holiday Decoration Neighbor Wars

President and Mrs. Obama sit down with Barbara Walters at the White House for their only joint network television interview this year. In addition to the personal interview, Mrs. Obama gives Walters a tour of the White House Christmas decorations, which highlight the extraordinary sacrifices of military families. This holiday special marks the third time the President and First Lady have sat for a joint interview with Walters. Christmas at the White House, a "20/20" holiday special, airs on FRIDAY, DECEMBER 23 (10:00-11:00 p.m., ET) on the ABC Television Network. Portions of the interview, which took place on December 15, will also air on "Good Morning America" and "Nightline," as well as on ABC News Radio, ABC NewsOne and on "The View."

Plus: It is always a good plan to have a designated driver, but what happens when the designated driver is just nine? Jim Avila reports.

Also: Some families are getting the best Christmas present this year -- their loved ones coming back from Iraq, just in time for the holidays. They are the last ones out, as the mission in Iraq officially ended last Thursday. ABC News' Bob Woodruff follows the journeys of three soldiers from Kuwait to Ft. Bliss in El Paso, Texas for their emotional family reunions.

And: Holiday decoration neighbor wars... Nothing says the holidays like a house decorated with over-the-top lights and waving Santas. But as John Berman found out, sometimes the holiday spirit can be rocked by nasty feuds over such things as electricity and traffic jams, and some would-be Grinches would like to pull the plug on the whole thing.

David Sloan is executive producer.