Leticia Guevara, a 32-year-old nursing assistant who volunteered to remove debris, unload provisions and give support in the fences after the 7.1 earthquake that hit Mexico on September 19, poses for pictures in Mexico City on September 25, 2017. What struck Guevara the most was "the unity of the Mexican people." 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