jimmy carter

President Barack Obama stands with, from second from left, former Presidents George W. Bush, Bill Clinton, George H.W. Bush, and Jimmy Carter at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013.

Charles Dharapak/AP

President Barack Obama stands with, from second from left, former Presidents George W. Bush, Bill Clinton, George H.W. Bush, and Jimmy Carter at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas on Thursday.