produce that. and couplers between the cars are tight couplers designed to in cases remain engaged. to keep the train in one piece in so far as possible. so >> how fast do these trains go? do you have a sense? >> not actually. not actually familiar with the speed in that area. but the northeast corridor in general can host trains up to 125 miles per hour. that being a regional train, i'm sure it's going less than that. i would say probably 60 80 miles per hour is probably the general area. >> we have a minute so we need to go to commercial break. can you tell us how long after