CNN CNN Newsroom May 18, 2013 16:02:00
Of course, a number of passengers were injured. 250 passengers between the two trains. 70 people were hospitalized. the good news is the vast majority have been released from the hospital. three remain in critical condition. here are some of the things that the national transportation safety board is taking a look at as possible reasons for the crash. >> we'll be looking at the braking performance of the train, the condition of wheels, condition of the car, we'll be looking at the general condition of the track and the rail bed. >> reporter: still a lot of work to be done. so many possible cau...