 Stephen Mather, the first Director of the National Park Service, was a main supporter of building a tourist clientele for the parks, which would in turn attract increasing appropriations from Congress and establish the Park Service as a legitimate and noteworthy bureaucratic agency.Mather and his chief aide, Horace Albright, who would also be his successor, worked to make the parks as accessible as possible and, with drive-through attractions such as the Tunnel Tree, as memorable as possible.Mather and Albright had already worked on the "See America First" campaign, trying to connect with western railroads to increase visitation to the parks.