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BARCELONA, SPAIN - AUGUST 17:  A damaged van, believed to be the one used in the attack, is surrounded by forensics officers in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city.  (Photo by David Ramos/Getty Images)
BARCELONA, SPAIN - AUGUST 17:  A damaged van, believed to be the one used in the attack, is surrounded by forensics officers in the Las Ramblas area on August 17, 2017 in Barcelona, Spain. Officials say 13 people are confirmed dead and at least 50 injured after a van plowed into people in the Las Ramblas area of the city.  (Photo by David Ramos/Getty Images)

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    Witness describes 'immediate carnage' in Spain

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Witness describes 'immediate carnage' in Spain

Ali Shirazinia was at Las Ramblas avenue in Barcelona, Spain, when a van rammed through the crowd. Listen to him describe what he saw.

Witness describes 'immediate carnage' in Spain

Ali Shirazinia was at Las Ramblas avenue in Barcelona, Spain, when a van rammed through the crowd. Listen to him describe what he saw.