Later , amid a push for greater integration and concerns about the impact of heightened security on trade relations following the September 11 attacks in 2001 , an effort was organized in 2003 by the Canadian Council of Chief Executives , U.S. Council on Foreign Relations , and the Mexican Council on Foreign Relations called the Independent Task Force on North America . Several weeks before a meeting of North American leaders on March 23 , 2005 the Task Force issued a press release and a statement from the Task Force 's chairmen calling for deeper integration of NAFTA to form a North American Economic and Security Community by 2010
September 11 attacks
September 11 attacks
North American Union