There's a saying that presidents age twice as fast while in office. Take a look back over the past 60 years of U.S. presidents and judge for yourself how much the office aged them.
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Cecil W. Stoughton/White House Press Office
Lyndon B. Johnson taking the oath of office on Air Force One at Love Field Airport two hours and eight minutes after the Nov. 22, 1963, assassination of President John F. Kennedy in Dallas, Texas. Johnson was 55 years old when he was sworn into office.