The conference is going on for three days.

21.
Hillary Clinton next to Professor Ian Greer, President and Vice-Chancellor, Queen's University Belfast. during the three-day international conference at Queen's University Belfast to mark the 25th anniversary of the Belfast/Good Friday Agreement. Picture date: Monday April 17, 2023. PA Photo. See PA story ULSTER Agreement. Photo credit should read: Niall Carson/PA Wire Photo: Niall Carson

22.
Mark Durgan attending the three-day international conference at Queen's University Belfast to mark the 25th anniversary of the Belfast/Good Friday Agreement. Picture date: Monday April 17, 2023. PA Photo. See PA story ULSTER Agreement. Photo credit should read: Liam McBurney/PA Wire Photo: Liam McBurney

23.
Lord Alderdice (left) and Mark Durgan attending the three-day international conference at Queen's University Belfast to mark the 25th anniversary of the Belfast/Good Friday Agreement. Picture date: Monday April 17, 2023. PA Photo. See PA story ULSTER Agreement. Photo credit should read: Liam McBurney/PA Wire Photo: Liam McBurney

24.
(left to right) Former Sinn Fein president Gerry Adams, former taioseach Bertie Ahern and Jonathan Powell speaking to media at the three-day international conference at Queen's University Belfast to mark the 25th anniversary of the Belfast/Good Friday Agreement. Photo: Liam McBurney

