In 1998, the Irish authorities were again party to a settlement, the Good Friday Agreement, which set up power-sharing institutions within Northern Ireland, North-South instructions and links between the various components of the United Kingdom and the Republic of Ireland. The Irish state also changed Articles 2 and 3 of the constitution to acknowledge both the existence of Northern Ireland and the desire of Irish nationalists for a united Ireland. Even in the wake of the post-Good Friday Agreement incorporation of the Provisional IRA and Sinn Féin into electoral politics, there remain several republican paramilitary groups who wish to use force to destabilise Northern Ireland – such as the Real IRA and the Continuity IRA. Irish security forces continue to be used to try to prevent attacks by such groups.