Pola Diaz, a 53-year-old social worker and rescuer who volunteered as a so-called "Topo" (mole) -- as the diggers who burrow their way into collapsed buildings are known -- after the 7.1 earthquake that hit Mexico on September 19, poses for pictures in Mexico City on September 25, 2017. What struck Diaz the most was the young people helping. A week after an earthquake that killed more than 300 people, a shaken Mexico was torn on September 26 between trying to get back to normal and keeping up an increasingly hopeless search for survivors. / AFP PHOTO / OMAR TORRES