Pope Francis peers from the window of his helicopter as he arrives in San Cristobal de las Casas, Mexico, Monday, Feb. 15, 2016. Francis is celebrating Mexico's Indians on Monday with a visit to Chiapas state, a center of indigenous culture, where he will preside over a Mass in three native languages thanks to a new Vatican decree approving their use in liturgy. The visit is also aimed at boosting the faith in the least Catholic state in Mexico. (AP Photo/Eduardo Verdugo)