The chief carver of Mount Rushmore who was responsible for refining the expressions on the faces of the monument's four presidents was honored Saturday with a plaque that recognizes his work.

Luigi Del Bianco was an Italian immigrant and stone carver whose job included the challenging tasks of sculpting Jefferson's lips and Lincoln's life-like eyes. With the help of Del Bianco's descendants, the National Park Service unveiled a bronze plaque Saturday in his honor. It will be on display at the Lincoln Borglum Visitor Center.