A woman holds her child as she attends a protest outside the U.S. embassy before the arrival of President Barack Obama in Mexico City, Thursday, May 2, 2013. (AP Photo/Marco Ugarte)

 

              A woman holds her child as she attends a protest outside the U.S. embassy before the arrival of President Barack Obama in Mexico City, Thursday, May 2, 2013. (AP Photo/Marco Ugarte)
A woman holds her child as she attends a protest outside the U.S. embassy before the arrival of President Barack Obama in Mexico City, Thursday, May 2, 2013. (AP Photo/Marco Ugarte)