Certifying her reputation as queen of the "gets" -- especially now that Barbara Walters is, for all intents and purposes, out of the competition -- Diane Sawyer has landed the first interview with Mark Kelly, the astronaut husband of Congresswoman Gabrielle Giffords. ABC said that the interview will air as a special edition of 20/20 on Tuesday, titled, "The Congresswoman and the Astronaut An American Story of Love and Strength."