Volunteers remove rubble during the search for survivors in a flattened building in Mexico City on September 20, 2017 after a strong quake hit central Mexico on the eve killing at least 240 people. A powerful 7.1 earthquake shook Mexico City on Tuesday, causing panic among the megalopolis' 20 million inhabitants on the 32nd anniversary of a devastating 1985 quake. / AFP PHOTO / PEDRO PARDO (Photo credit should read PEDRO PARDO/AFP/Getty Images)