Chile's president Michelle Bachelet, Mexico's President Enrique Pena Nieto and Costa Rica's President Luis Guillermo Solis are seen during an official visit to a local fair as part of XI Summit of the Pacific Alliance in Puerto Varas, Chile June 30, 2016. Ximena Navarro/Courtesy of Chilean Presidency/Handout via Reuters ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. EDITORIAL USE ONLY.