CUSTER (REUTERS).- Nearly every morning for more than half a century, 85-year-old Ruth Ziolkowski rises around dawn, puts her feet on the ground and gives thanks she is part of a dream. Since 1947, she has worked at the Crazy Horse monument to Native Americans in the Black Hills of South Dakota, where she is leading the effort to literally move a mountain. “I’m tickled to death to get up every morning and go to work,” Ziolkowski, president of the non-profit Crazy Horse Memorial Foundation, said in an interview this summer. Billed as the world’s largest sculpture, Crazy Horse is only a 20-mile drive from better-known Mount Rushmore, where faces of presidents George Washington, Abraham Lincoln, Thomas Jefferson