To combat the removals, a collective of librarians, historians, and data experts has organized a project called Save Our Signs (SOS). The group is attempting to “build a community archive of the signs, exhibits, and texts that could soon disappear from our national parks.” It encourages park visitors to anonymously submit photos of interpretive signs from any area administered by the NPS. “The National Parks have been called ‘the nation’s largest outdoor history classroom,’” McBurney said. “Our national parks are not monuments to a single, sanitized version of American greatness. The group is attempting to “build a community archive of the signs, exhibits, and texts that could soon disappear from our national parks.” It encourages park visitors to anonymously submit photos of interpretive signs from any area administered by the NPS.