Argentina's President Cristina Fernandez waits for the arrivals of Uruguay's President Jose Mujica and Brazil's President Dilma Rousseff for a photo opportunity, at the Mercosur summit in Mendoza, Argentina, Friday, June 29, 2012. Leaders of the four-nation are discussing the idea of sanctioning Paraguay's new government for ousting its president in a quick impeachment trial last week. (AP Photo/Natacha Pisarenko)
