Citla, the "Guardian Angel of the Mountain", as hikers called him, died on September 28, 2017, and since then mountaineers from different parts of Mexico, together with their friends and acquaintances, are seeking permission to build a monument at the foot of the dog's grave, said Hilario Aguilar Aguilar, municipal trustee of Chalchicomula de Sesma. "The National Commission of Protected Areas rejected the permit to install the monument dedicated …