The helicopter carrying Pope Francis prepares to land in San Cristobal de las Casas -where he will celebrate his second open-air mass- in Chiapas State, on February 15, 2016. Pope Francis urged Mexicans on Sunday to reject the devil and build a nation free of "merchants of death" during an open-air mass with 300,000 people in a crime-ridden city. AFP PHOTO / RONALDO SCHEMIDT