** ADDS DATE AND LOCATION ** Enrique Pena Nieto, left, presidential candidate of the Institutional Revolutionary Party (PRI), shakes hands with Josefina Vazquez Mota, presidential candidate for the National Action Party (PAN) during an agreement ceremony to comply with the wishes of the majority, respecting the final results of the July 1 elections, in Mexico City, Thursday, June 28, 2012. (AP Photo/Eduardo Verdugo)
(AP)
