Good Friday Agreement: Negotiated by US Senator George Mitchell and signed by parties including Ulster Unionists (David Trimble), SDLP (John Hume), Sinn Féin (Gerry Adams), the Irish government (Bertie Ahern), and the British government (Tony Blair). Key terms included power-sharing, cross-border bodies, decommissioning of weapons, and RUC reform. It was approved by referendums in Northern Ireland and the Republic.