Three Leaders. Who's afraid? Click picture for larger version. Take in the look on his face. . .

ALFREDO ESTRELLA/AFP/Getty Images)

CHICHEN ITZA, MEXICO: Mexican President Vicente Fox (L), his US counterpart George W. Bush (C) and the Canadian Prime Minister Stephen Harper climb the Kukulkan pyramid during a tour at the archaeological area of Chichen Itza in the Yucatan State, Mexico, 30 March 2006. The thorny issue of immigration will likely dominate the agenda as the three leaders gather for a two-day summit at this heavily guarded resort town