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    Official: This is a mass casualty situation

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Official: This is a mass casualty situation

Chief Charles Hood with the San Antonio Fire Department speaks with CNN's Fredricka Whitfield about bodies of undocumented immigrants being found in a tractor-trailer in a Texas Walmart parking lot.

Official: This is a mass casualty situation

Chief Charles Hood with the San Antonio Fire Department speaks with CNN's Fredricka Whitfield about bodies of undocumented immigrants being found in a tractor-trailer in a Texas Walmart parking lot.