Hundreds of commuters were injured and 49 killed when a train crashed today in Buenos Aires, Argentina.
The packed train reportedly failed to stop at the end of the line, colliding with a barrier at 16 mph and resulting in Argentina's most devastating train accident since 1970.
Emergency Medical Director Alberto Crescendi reports that 550 people are injured in today's crash, and crews are working to rescue dozens of people still trapped in the first car.
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