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Rescuers are racing against the clock to reach survivors trapped under the rubble of a school in Mexico City. At least 21 children and five adults died as the school collapsed following a powerful earthquake. Many rescuers are volunteers, including Daniel Galo, who spoke to Newshour.

(Photo: Rescue teams look for people trapped in the rubble at the Enrique Rebsamen elementary school in Mexico City. Credit: Mario Vazquez/AFP/Getty Images)