His international efforts continued into the 2000s. On February 15, 2003, Jackson spoke in front of over an estimated one million people in Hyde Park, London at the culmination of the anti-war demonstration against the imminent invasion of Iraq by the U.S. and the United Kingdom. In November 2004 Jackson visited senior politicians and community activists in Northern Ireland in an effort to encourage better cross-community relations and rebuild the peace process and restore the governmental institutions of the Belfast Agreement.