At the opening of the Ronald Reagan Presidential Library on November 4, 1991, five American presidents were photographed together for the first time in history. President Ford had either worked with or run against each of them -- in some cases both. From left: President George H.W. Bush (b. 1924); President Ronald Reagan (1911-2004); President Jimmy Carter (b. 1924); President Gerald R. Ford (1913-2006); and President Richard Nixon (1913-1994).