unions that have said that's an invasion of an expectation of privacy, and it simply. . we have cameras on the clerks at seven-11 banks, et cetera its been pushed back to the representatives of the employees. i think it's imperative. it has been for years. we were talking about this back on september 11 2001 how a camera in the cockpit there, just like in the train cab here would have made perhaps, all the difference in the world. >> peter, you agree with mary on this right? >> absolutely. there's no reason not to have cab facing cameras in our railroad system. it would help investigators and it is as mary said it is not an invasion of privacy. >> peter, these positive train control systems that would automatically prevent a train from going too fast into a dangerous curve, there's supposed to be in effect throughout the northeast corridor by the end of the year and the area of philadelphia