1954    The first nuclear-powered submarine, the {{USS|Nautilus|SSN-571|6}}, is launched in Groton, Connecticut by Mamie Eisenhower, the First Lady of the United States.

1962    First Lady Jacqueline Kennedy takes television viewers on a tour of the White House.

1968    Former First Lady Jacqueline Kennedy marries Greek shipping tycoon Aristotle Onassis.

2000    Hillary Rodham Clinton is elected to the United States Senate, becoming the first former First Lady to win public office in the United States, although actually she still was the First Lady.