A rescue worker walks with his dog at the train crash site near the town Szczekociny, Poland, Sunday, March 4, 2012. Two trains running on the same track collided head-on in southern Poland late Saturday, leaving more than a dozen people dead and more than 50 injured in the country's worst train disaster in more than 20 years. (AP Photo/Petr David Josek)

Associated Press
A rescue worker walks with his dog at the train crash site near the town  Szczekociny, Poland, Sunday, March 4, 2012. Two trains running on the same track collided head-on in southern Poland late Saturday, leaving more than a dozen people dead and more than 50 injured in the country's worst train disaster in more than 20 years.  (AP Photo/Petr David Josek)
A rescue worker walks with his dog at the train crash site near the town Szczekociny, Poland, Sunday, March 4, 2012. Two trains running on the same track collided head-on in southern Poland late Saturday, leaving more than a dozen people dead and more than 50 injured in the country's worst train disaster in more than 20 years. (AP Photo/Petr David Josek)
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