CNN CNN Newsroom May 18, 2013 23:06:00
The collision that happened on friday night. they are paying attention to one thing that they found but they're not saying that this is the cause. they located a fracture on one of the rails of the eastbound train. that was the one that was heading from new york to new haven and is the one that derailed and then another train smacked into it that was going in the opposite direction. >> it is of substantial interest to us. we'll be sending a portion of that track back to the laboratory in washington, d.c. for analysis. >> reporter: investigators also rord event recorders from both of the trains...