How presidents have aged while in office

Published On: Sep 24 2012 08:20:28 PM PDT   Updated On: Aug 04 2016 08:16:51 AM PDT
President Barack Obama, Jan. 17, 2016

There's a saying that presidents age twice as fast while in office. With Thursday marking President Barack Obama's 55th birthday, take a look back over the past 60 years of U.S. presidents and judge for yourself how much the office aged them.