we have widened the area about 45 minutes or so. we sent out another 25 philadelphia police officers and supervisors in a widened search area to continue to search. we will not rest or stop. we will maintain focus on trying to get as much information as possible about search and rescue capacity and until we are firmly convinced that we have searched every possible place, we will not end those efforts. >> mayor, as you know there's something called positive train control. that's supposed to be able to make sure a train does not go 100 miles an hour into a 50-mile-an-hour curve. in this particular area in philadelphia it was not in place. we have now heard from the ntsb those in charge of the investigation, peter is a former ntsb manager. they want this. why isn't this in effect right