Reading Time: 1 minutes

Former U.S. presidents, George H.W. Bush (L), Bill Clinton (2nd L) and Jimmy Carter (R), walk together with evangelist Billy Graham and Franklin Graham (2nd R) before the Billy Graham Library Dedication on the campus of the Billy Graham Evangelistic Association in Charlotte, North Carolina May 31, 2007 . REUTERS/Chris Keane

Former U.S. presidents, George H.W. Bush (L), Bill Clinton (2nd L) and Jimmy Carter (R), walk together with evangelist Billy Graham and Franklin Graham (2nd R) before the Billy Graham Library Dedication on the campus of the Billy Graham Evangelistic Association in Charlotte, North Carolina May 31, 2007 . REUTERS/Chris Keane