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Volunteers and rescuers transfer an injured person after a powerful 7.1-magnitude earthquake, in Mexico City, capital of Mexico, on Sept. 19, 2017. (Xinhua/Francisco Canedo)

Volunteers and rescuers transfer an injured person after a powerful 7.1-magnitude earthquake, in Mexico City, capital of Mexico, on Sept. 19, 2017. (Xinhua/Francisco Canedo)