FILE - This Jan. 20, 1977 file photo shows President Jimmy Carter and First Lady Rosalynn Carter waving as they walk down Pennsylvania Avenue in Washington after Carter was sworn in as the nation's 39th president. At some point on Inauguration Day, if all goes expected, the president’s limousine will slow to a stop on its journey down Pennsylvania Avenue from the Capitol to the White House. A Secret Service agent will open the rear passenger door, and the newly sworn-in president will emerge from his car for a several-minute stroll. The crowd will cheer. The president will wave. In that moment, Pennsylvania Avenue is America’s red carpet. And the president is the only celebrity on it. The victory walk has become an iconic inaugural moment, one expected by the public and the press. And though the tradition dates only to President Jimmy Carter, it has already developed an air of inevitability and predictable patterns. (AP Photo, File)