"Ask not what your country can do for you, ask what you can do for your country."
Pictured here is the belated John Fitzgerald Kennedy who entered the Oval Office as President in the year 1960. He was the youngest president to be elected.
Lyndon Johnson, above, was the Vice-President of JFK until 1963. 3 hours after JFK was assassinated in 1963, Johnson took over the office.

President Nixon entered office in the year 1969.