Brazil's President Michel Temer, from left, Argentina's President Mauricio Macri and Paraguay's President Horacio Cartes, pose for a picture at the Mercosur Summit in Mendoza, Argentina, Friday, July 21, 2017.
Brazil's President Michel Temer, from left, Argentina's President Mauricio Macri and Paraguay's President Horacio Cartes, pose for a picture at the Mercosur Summit in Mendoza, Argentina, Friday, July 21, 2017. Marcelo Ruiz AP
Brazil's President Michel Temer, from left, Argentina's President Mauricio Macri and Paraguay's President Horacio Cartes, pose for a picture at the Mercosur Summit in Mendoza, Argentina, Friday, July 21, 2017. Marcelo Ruiz AP