Obama Holds Joint Press Conf. With Mexican And Canadian Leaders At White House

WASHINGTON, DC - APRIL 02: U.S. President Barack Obama (C), Canadian Prime Minister Stephen Harper (R), and Mexican President Felipe Calderon (L) participate in a joint press conference in the Rose Garden of the White House April 2, 2012 in Washington, DC. Obama hosted his counterparts from Canada and Mexico for the North American Leaders' Summit (NALS) with talks on cooperation among the three countries, North American's role in the Americas, and as well as other global economic, political, and security issues, according to a White House news release. (Photo by Alex Wong/Getty Images)