President Barack Obama has joined four of his predecessors in honouring one of their number, George W Bush, at the grand opening of his presidential library.
Despite political differences, there were smiles and jokes shared by the group in Dallas, with Mr Obama and Mr Bush posing for photos alongside Bill Clinton, George H W Bush and Jimmy Carter.
ITV News Correspondent Neil Connery reports:
While all took time to pay tribute to their nation's 43rd president, Mr Obama praised his immediate predecessor for his strength and resolve in the aftermath of the September 11 attacks.
He also paid tribute to him for his work on immigration reform, which if passed by Congress, Obama said, will be "in large part thanks to the hard work" of the man he succeeded in office.
In response, Mr Bush gave a closing speech with tears welling in his eyes.
"My deepest conviction, the guiding principle of the administration, is that the United States of America must strive to expand the reach of freedom," he said.
"I believe that freedom is a gift from God and the hope of every human heart."