How presidents have aged while in office

POSTED: 8:20 PM PDT September 24, 2012    UPDATED: 7:46 AM PDT August 4, 2015 
President Barack Obama

There's a saying that presidents age twice as fast while in office. If that's true, be sure to wish President Barack Obama a happy 54th birthday on Tuesday and then see how he and other presidents have aged while in office.