President George W. Bush shares a laugh with NBC Universal CEO Jeff Zucker Tuesday, April 22, 2008, during a meeting with the North American Competitiveness Council, attended by Mexico's President Felipe Calderon and Canada's Prime Minster Stephen Harper at the 2008 North American Leaders' Summit in New Orleans. White House photo by Joyce N. Boghosian
President George W. Bush, right, participates in a trilateral meeting Tuesday, April 22, 2008 in New Orleans, with Mexico's President Felipe Calderon and Canada's Prime Minster Stephen Harper and their delegations at the 2008 North American Leaders' Summit. White House photo by Joyce N. Boghosian
President George W. Bush, Canadian Prime Minster Stephen Harper and Mexico's President Felipe Calderon carry shovels of dirt at a tree planting ceremony in honor of Earth Day Tuesday, April 22, 2008 at Lafayette Square in New Orleans. White House photo by Chris Greenberg