; (B) President Hoover proclaimed that the Monument was established for the preservation of the white sands and additional features of scenic, scientific, and educational interest ; (C) the Monument was expanded by Presidents Roosevelt, Eisenhower, Carter, and Clinton in 1934, 1942, 1953, 1978, and 1996, respectively; (D) the Monument contains a substantially more diverse set of nationally significant historical, archaeological, scientific, and natural resources than were known of at the time the Monument was established, including a number of recent discoveries; (E) the Monument is recognized as a major unit of the National Park System with extraordinary values enjoyed by more visitors each year since 1995 than any other unit in the State; (F) the Monument contributes significantly to the local economy by attracting tourists