A woman cries after identifying the body of a loved one, who died in a commuter train crash, at the morgue in Buenos Aires, Argentina, Thursday Feb. 23, 2012. Wednesday's commuter train crash killed dozens and sent hundreds to emergency rooms. A federal judge was leading an investigation into what caused the rush-hour commuter train to slam into a barrier at the end of the track at a downtown station, crumpling cars around hundreds of riders. (AP Photo/Rodolfo Pezzoni, DyN)

Associated Press
A woman cries after identifying the body of a loved one, who died in a commuter train crash, at the morgue in Buenos Aires, Argentina, Thursday Feb. 23, 2012.  Wednesday's commuter train crash killed dozens and sent hundreds to emergency rooms.  A federal judge was leading an investigation into what caused the rush-hour commuter train to slam into a barrier at the end of the track at a downtown station, crumpling cars around hundreds of riders. (AP Photo/Rodolfo Pezzoni, DyN)
A woman cries after identifying the body of a loved one, who died in a commuter train crash, at the morgue in Buenos Aires, Argentina, Thursday Feb. 23, 2012. Wednesday's commuter train crash killed dozens and sent hundreds to emergency rooms. A federal judge was leading an investigation into what caused the rush-hour commuter train to slam into a barrier at the end of the track at a downtown station, crumpling cars around hundreds of riders. (AP Photo/Rodolfo Pezzoni, DyN)
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