survivability, they're also going to be looking to focus on that area. o we're going to look for any black box type recorders on board the tran. the signal system to see if there's any information there. and our operations team will be looking at the dispatchers, at the operators. so we've got a lot of work to do. we don't have a lot of daylight hours to do it, but we're going to do as much as we can, certainly, as we get on scene to see what happened to prevent it from happening again. >> it sounds like a lot of work for you guys in the days ahead. this was a push-pull car. eight cars total. can you say, the engine was at the rear of the train. can you say anything about the safetiness or the ability of