PLAINS, GEORGIA — Mourners are to begin paying their respects to Jimmy Carter on Saturday, kicking off a carefully choreographed six-day farewell for America’s longest-lived president. Flags have been flying at half-staff across the country since Carter died on Dec. 29 at the age of 100 in his hometown of Plains, Georgia. Carter’s state funeral officially begins on Saturday with Secret Service agents from his current and former protective detail carrying his casket to a hearse for a tour through Plains. The motorcade bearing his remains is to pause at Carter’s boyhood family peanut farm while a farm bell rings