through the weekend, having 300 crews out there to make the repairs necessary, getting it up and running today. they have also activated the same control systems we mandated with communications to restore service. we spoke this morning, they are making alternate arrangements. they were greeted by pair nutter in philadelphia this morning. we are encouraging people no get out here back on board these trains. >> happy to hear it's smooth sailing there so far. thank you so much. we will check back in. it is still a mystery as to what caused an engineer to act sell rate to deadly speeds. fbi verdicts are on the scene trying to figure out if something hit the train first. >> erin mclaughlin is live with that part of the story. >> reporter: good morning. fbi forensics verdicts are expected to take a look at a circular marking on the