NEW ORLEANS, the United States, April 21 (Xinhua) -- Leaders of Canada, Mexico and the United States gathered here on Monday for the fourth annual summit of the Security and Prosperity Partnership of North America (SPP). The following is a snap shot on previous SPP summits.

    Waco, Texas, March 23, 2005 -- The leaders of Canada, the United States and Mexico met in Waco, Texas, to discuss trilateral cooperation, with particular attention to shared security, prosperity and quality of life objectives. A key outcome of this meeting was the establishment of the Security and Prosperity Partnership of North America (SPP). The SPP is a commitment by Canada, the United States and Mexico to work together to build a safer and more economically dynamic North America. It strengthens the ties that have shaped the North American partnership for decades, and outlines an agenda for greater cooperation in areas as diverse as security, transportation, the environment and public health.

    Cancun, Mexico, March 31, 2006 -- Prime Minister Stephen Harpermet with the U.S. President, George W. Bush, and former president of Mexico, Vicente Fox, in Cancun, Mexico. Leaders established five priorities under the SPP: strengthening competitiveness in North America; emergency management; cooperation on avian and human pandemic influenza; energy security; and smart, secure borders.

    Montebello, Canada, August 22, 2007 -- Canadian Prime Minister Stephen Harper, Mexican President Felipe Calderon and U.S. President George W. Bush met in Montebello, Canada. But the summit, dogged by hundreds of protesters, was cut short as Calderon had to leave early to deal with disasters caused by Hurricane Dean at home. The gathering did not achieve any major substantial achievements except some consensus on issues such as the protection of consumers and the importance of finding solutions to environmental challenges.