U.S. Vice President Joe Biden, left, and Josefina Vazquez Mota, presidential candidate for the National Action Party, PAN, shake hands as they pose for pictures in Mexico City, Monday, March 5, 2012. ... more 
U.S. Vice President Joe Biden, left, and Josefina Vazquez Mota, presidential candidate for the National Action Party, PAN, shake hands as they pose for pictures in Mexico City, Monday, March 5, 2012. Biden is on a one-day official visit to Mexico. (AP Photo/Alexandre Meneghini) less 
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Associated Press | Photo By Alexandre Meneghini
Mon, Mar 5, 2012 5:22 PM EST