conversation and i want you to hear as much as that as possible here is a little more information from aaron don donon the spokesperson from metro north. >> it was as seven car train. the first five cars derailed. it was in the curve? the tracks where the hudson river meets the harr little hari coach know hoiidon't know how e on the train. it was an early morning train and it was typically less crowded than normal. of course today was a holiday. >> right now we are going to bring in ourin transportation expert. dr. todd curtis, dr. curtis are you there? >> i can hear you. >> while we are speaking the govenor has arrived on the scene as well as police commissioner ray kelly. so, dollar dr. curtis to be cles very, very early on this very lengthy investigation. as you have been listening this morning the early witness accounts the train was going fast. the trains go fast. do we really know what that means right now? >> we don't. because how fast the train should be going in that particular section of the track will depend on several factors. and one of the factors that was mentioned a few minutes ago was