 The September 11 attacks changed the priorities of U.S. foreign policy toward the strengthening of regional security.As a result, several trilateral summit meetings regarding this issue have occurred within the framework of the Security and Prosperity Partnership of North America (SPP), a region-level dialogue with the stated purpose of providing greater cooperation on security and economic issues, founded in Waco, Texas on March 23, 2005 by Paul Martin, former Prime Minister of Canada, Vicente Fox, then-President of Mexico, and George W. Bush, former President of the United States.Other issues of concern are the ones related to conservation and protection of the environment, the North American Agreement on Environmental Cooperation (NAAEC) consists of a declaration of principles and objectives concerning this issues as well as concrete measures to further cooperation on these matters tripartitely.