Dozens dead in Argentina train wreck

 

Trapped passengers from a commuter train that crashed

 

Rescue workers extract a passenger from a commuter train that crashed

 

Commuters help a passenger who was injured when a commuter train crashed

 

Firemen rescue wounded passengers from a commuter train after a collision

 

Commuters lie on stretchers after being injured when their train crashed 

 

Commuters react inside the Once train station after a train crashed when its brakes failed at rush hour in Buenos Aires

 

A view of the front of a commuter train that crashed into the Once train station during rush hour in Buenos Aires

 

Commuters help a passenger who was injured when a commuter train crashed into the Once train station during rush hour in Buenos Aires

 

A packed commuter train plowed into the buffers at a Buenos Aires station during Wednesday's February 22,2012 morning rush hour, killing 49 people and injuring more than 600 in Argentina's worst rail accident in more than 30 years

 By Hilary Burke and Helen Popper