Couric was a special correspondent for ABC News, based in New York, a role she has incorporated into her talk show. Her first appearance on the network was a Sarah Jessica Parker interview on "Nightline". Couric co-anchored coverage of the 10th anniversary of the September 11 attacks, alongside Diane Sawyer, Christiane Amanpour, Barbara Walters, Elizabeth Vargas, George Stephanopoulos, and Robin Roberts. Couric was hosting "Today" on "NBC" at the time of the attacks, and led CBS News's coverage of the 5th anniversary. Couric also guest co-hosted "The View" and "Live! with Regis and Kelly". Couric interviewed Lady Gaga in primetime on Thanksgiving as part of "A Very Gaga Thanksgiving". In November 2011, Couric hosted a special primetime ABC news program highlighting Regis Philbin's retirement, after Philbin's 25-year tenure at ABC.