Former US president Bill Clinton has said granting a visa to Sinn Fein's Gerry Adams in 1994 "made all the sense in the world".
He said he agreed to the then Sinn Fein leader's request so that the United States would "look like an impartial body" during the Northern Ireland peace process.
Mr Clinton discussed his decision during a conference at Queen's University Belfast to mark the 25th anniversary of the Good Friday Agreement.
