UPDATED 5:50 AM EST, January 18, 2013
WASHINGTON (AP) — Four years ago he was the fifth-youngest president to take the oath of office. Now Barack Obama is 51, his hair more gray, his face more lined.
He's the parent of a teenager and a tween. (Insert your own joke about teens and gray hair here.) His blood pressure has ticked up a bit, although it's still excellent. He's quit smoking. He's a pet owner.
