Airing on Wednesday, September 12 at 9:00 p.m., ET. For the 30th anniversary of Elvis Presley's death, ABC News is producing a two-hour TV event in High Definition that will examine how the King of Rock-and-Roll re-invented Las Vegas, and how it re-invented him. Top recording stars of 2007 perform Elvis' Vegas classics, woven in with previously unreleased music and documentary footage -- never-before-seen-film of Elvis' Vegas years