Clearly it was reckless. Nutter responding to speculation that the engineer might have been speeding to make up for lost time. Im sure they would not have minded being another 20 25 30 minutes late as opposed to dying unnecessarily in a train wreck. Youre not going to hear the ntsb making comments like that. Still conducting their preliminary investigation the ntsbs taking issue with the mayors comments calling them inflammatory. But they do agree bostian hit the emergency brakes too late. In the next three seconds, three or four seconds, the speed of the train had only decreased to 102. This Surveillance Footage along with the initial examination of the data reveal the train was traveling at 106 miles an hour twice the appropriate speed entering the sharp turn. He was already in the curve at that point. Youre supposed to enter the curve at 50 miles an hour. Bostian spoke to Philadelphia Police the night of the crash. And according to a Law Enforcement source told them he couldnt recall his speed. His lawyer says he doesnt even remember the crash itself. He remembers going through that area generally. Has absolutely no recollection of the incident or anything unusual. Police now in the process of obtaining a search warrant of the engineers phone records to determine if he was distracted during the time of the crash. Lawmakers and critics also saying even if human error is the cause, this crash raises issues about Safety Systems that still are not in place. And could have saved lives. Who made this happen and why did it happen at all . Lets get deeper into these questions in the terms of what we do and do not know. We have cnns transportation and government regulation correspondent rene marsh. Those are the two Big Questions investigatively this morning. What do we know on them . Well you mentioned this, chris. We know that investigators are itching to ask this engineer even more questions beyond that initial comment that he made that he didnt recall his speed. Investigators havent been able to get anything else from him. He is now lawyered up. But we do know that the engineer his name is Brandon Bostian. Hes 32 years old. Hes from new york. We know that he has been an amtrak engineer since 2010. And before that he was an amtrak conductor. But not only officials here in philadelphia wants to speak to him, but the ntsb wants to speak to him as well as they piece together what happened in the minutes and seconds before this train derails. These are the tracks were talking about. This is where it all happened. We know from the ntsb that this particular stretch of track where this derailment happened was not equipped with an automated speed control system which is commonly known as positive train control. We know there are other sections of the northeast corridor that does have this technology. But this specific section did not. And the ntsb firmly believes that had this technology been in place it could have essentially prevented this sort of thing from happening. What is positive train control . In simple terms if a train is going too fast this technology has the ability to slow the train down. And ntsb thinks that would have made all the difference here chris. Right. And the simple reality is it could have made a difference and it matters why it wasnt there. Were going to get into that. Rene ill check back with you. Thank you very much. Lets bring in robert of the ntsb. Hes heading up the investigation. Thank you for joining us. We know youre very busy. Deal with things in terms of urgency, the people unaccounted for, that frightens people and thinks there may be still something going on at the scene. Thats not the reality. How do you see the situation . Well certainly some people just get off the train, they might get a ride home theyre not injured, theyre shaken up but not going to the hospital and theyve not reported in. So this is something that the Philadelphia Office of Emergency Management is dealing with. And we hope and pray that everyone has been accounted for at this point. And its about logistics, its not about the reality of what remains at this scene, correct . Thats correct. Its not like an airline where we have assigned seats and people got on 30th street station, not everybody shows up train is different than plane when it comes to that kind of accountability. Good to have that straight. Now, in terms of why this happened. Everybody is playing with this idea of speed. Can you confirm that that is a priority in terms of understanding why this happened at this point . It is certainly something that were very interested in. This train was doing over double the maximum authorized speed for this area. So that is something that were very interested in trying to understand. Why was the train going that fast . And the ntsb often makes the point in these situations that common sense isnt enough. That well he must have done it end of story. Youre looking at a lot of different factors that could play into what anybody in control was doing like what . Absolutely. We really take a wholistic approach to this accident investigation. Certainly we would like to interview the engineer and find out what his perspective was. We want to know the mechanical condition of the train. We want to look at the signal system and the tracks to look at everything that could have led to the occurrence. It could be equipment, it could be just him, it could be a combination and you want to be accurate because its about what you recommend Going Forward. Were going to get to that. His saying through his lawyer he doesnt remember what happened that smacks familiar. Thats what we heard in that situation up in the bronx in new york. The engineer there said i dont remember what happened. People thought he was just covering for himself but later on wasnt it discovered he may have had a nonrecognized form of narc lep si . In that particular case youre right. It was a sleep disorder that obstructive sleep apnea. But youre right. Its not uncommon when somebodys been through a traumatic event such as this one here that they dont remember things leading up to the accident. So youre not necessarily suspicious because the engineer said that at this point . No we have not personally interviewed the engineer ourselves and we hope to have that opportunity very soon. Toxicology is not your bailiwick in this right . Thats up to amtrak to do that . Yes, amtrak is required to do that by federal law. And he doesnt have to give them the information and he doesnt have to talk to any of you. He could retain his right not to participate in this and if anything happens it happens. Absolutely. But in most transportation accidents people will talk to the ntsb because were interested in nothing more than improving the safety of our transportation system. All right. Now the big question. I know politicians are fighting over how much money to give to amtrak and that its wasteful spending. I know that debates going on. But that is coloring peoples perception of the reality of what might have made a difference here. In your opinion as someone whos heading up the investigation, did this have to happen the way it happened . Well we have at the ntsb have long advocated and called for positive train control. And positive train control, which is required by law to be implemented by the end of this year positive train control is designed to prevent the very type of an accident that were dealing with here. People will push back and say, no its his fault, he did it thats the answer. Forget about infrastructure. I dont want to hear it. Whats your response . The fact is humans make mistakes. Weve seen that over the years. So we need a system that will provide redundancy so that when that error does occur the positive train control will kick in and say im not going to let you make that mistake to hurt us all. Thats what ptc does. Now, if it sounds like im leading the interviewee here its because i am. Its because we keep hearing about this situation and it gets ignored because the politics involved. Thats my suggestion. Just to be clear, if hes going too fast if hes negligent, whatever the findings are, lets assume the worst. That still doesnt have to mean necessarily that these people would have died that this would have been hurt because the tracks themselves could have made a difference the software the controls on the tracks. Explain that to me. Youre certainly not leading me on this because positive train control is something that the ntsb has long recognized will save lives. So weve long called for it. Why hasnt it been done as far as you know . Well i think that would best be explained by the railroads and the federal railroad administration. It certainly hasnt been done and is supposed to be done by the end of this year. They really should have been here already this system in place, yes . Well not required until the end of the year. In fact most of the tracks up in this part of the country, the northeast sector are covered by some version of positive train control. For some reason this particular area has not been installed. And it matters even if you find that specifically in this case this is about human error, its about speed, even if i know those are assumptions and you dont want to get ahead of it but assuming that theres still a big part of this story that needs to be told about the infrastructure and how to keep people safe on the rails s that fair . Absolutely. Positive train control will save lives. Mr. Sumwalt, i know you have a long day ahead of you. Thank you for checking in with us. Thank you, chris. The reason were pushing this issue about what we could have done and what we should do to make this less likely is because of the human cost. Its not about just money and politics. Its about people who lost their lives. Their families who will never get back these seven people. There are hundreds who were injured. So now who are those people . Five of the seven have been identified. Eight more people are still in Critical Condition. We know that hundreds have been hurt by this. So thats an important part of what drives the interest here. Cnns outside Temple UniversityMedical Center in philadelphia checking in on the latest conditions of people and what we know about who was hurt and why. Sumlet. Well chris, there are still an untold number of people still unaccounted for. And according to the Philadelphia Inquirer they are reporting this morning as many as 12 people may still be missing. Among them we know is robert gildersleve. But we are starting to know more about those seven killed five of which have been identified. Among them is 39yearold Rachel Jacobs she is a mother of two from new york city and was also a chief executive of a small tech company. Also Justin Zemser, a 20yearold midshipman a sophomore at the u. S. Naval academy and he was on his way home to new york. Were outside temple hospital where over 20 people remain hospitalized eight still in Critical Condition. According to the medical chief there are three major surgeries scheduled for later today. Chris. All right. So were tracking those who were lost those who are still being treated and of course were going to have just all of the implications for people who are on that train and are still dealing with it today. Now, of course what happened here in philadelphia is going to make a big difference on the nations busiest railroad. Its called the northeast corridor it goes between new york and philadelphia and service is obviously interrupted because tracks are twisted into ribbons. We have cnns brian at penn station with that part of the story for us. Brian. Chris, the announcement inside is Service Remains suspended indefinitely the words theyre using are until further notice. Right now some trains are moving north of new york here and south of philadelphia where you are but its as if theres been a giant hole punched in the middle of the corridor, the rail line where the nations business gets done. Its the kind of train where politicians and executives were all riding together. One time i was on the plane i heard them talking about an upcoming merger. Look at the data you can see by the numbers how important this rail line is. More than 750,000 passengers per day. By one estimate this is a hit to the economy of about 100 million per day when rail service is suspended. To put it in perspective were talking about a rail line that is more than four times more popular popular, more commonly used than the next biggest rail line in the United States. That just goes to show for americans watching elsewhere in the country who dont really rely on the rails goes to show how important it is between boston new york philadelphia and washington. And, chris, this is all just a reminder among other things a reminder that there is no real backup. Some people are taking buses, some are taking planes some flights have been added between new york and washington for example. But there is no rail backup. There is no extra line for these trains to be running. Mayor nutter said yesterday he believes there will be no service through philadelphia through the end of the week. All right, brian, thank you for that strong point. There is no backup. Thats true. Thats why were going to monitor it throughout the week until it changes for the better. And its important to repeat alisyn investigators tell us they are riding the trains they are controlling the scene there. No one has been found at the scene. Thats not why people are unaccounted for. Thats important for people to know. Thank you for that chris. Well get back to you momentarily. But we do have some breaking International News overnight to tell you about. At least 67 People Killed in a factory fire in the northern philippines. Recovery operations ongoing at this hour at the shoe factory just north of manila. Its believed sparks from welding work ignited the fire when they hit some chemicals sending thick smoke into the air. Five people were pulled alive from that burning factory. Still, no sign of u. S. Military chopper that went down or missing rather in nepal. We dont know if its gone down. Six u. S. Marines and two Service Members from nepal were onboard. The crew was helping with earthquake relief efforts tuesday night when radio contact was lost. Want to bring in will ripley live from katmandu on the latest for the search. Reporter michaela this is where search helicopters from three countries are taking off and landing. The United States india and nepal all involved here with the americans leading the effort. You can take a look at the new video this morning showing the u. S. Marine ospreys heading to the search area. They divided the area in three sectors. There are also 400 nepali troops sifting through rough terrain and will continue the ground search as the visual continues to come up empty with just a few more hours of daylight left here in nepal. I want to show you a map of the two earthquakes that struck this country. A major 7. 3 earthquake this week. And of course that 7. 8 that was on april 25th. The search efforts are focusing on the eastern location. One quake happened in the east of katmandu the other happened to the west. Search crews right now are in the east. If you look at the numbers they are staggering thinking about the death toll 8,250 people confirmed dead. 2,427 injured. And of course tens of thousands of people remain homeless right now because of the extensive damage from both of those large earthquakes and all of the aftershocks. And there are also concerns this morning, alisyn that bureaucracy is preventing aid from getting to people as quickly as they need it. A lot of people who dont have what they need alisyn. Oh my goodness. Lets hope they can clear up all the red tape and everything is an impediment there. Will thank you so much for that. Meanwhile, one of the secret Service Agents accused of driving drunk through an active bomb investigation at the white house back in march now plans to retire. A Law Enforcement source telling cnn that marc conley who was the second ranking agent on president obamas detail is leaving. The news coming ahead of todays release of that report that found conley and george ogelvie were more likely than not was there a wells report on this drinking incident with the secret service . More likely than not . The vagueness weve heard this week. I thought you could be pretty sure those breathalyzer tests are pretty exact, are they not . Yes, but they didnt take one in the field. There is that. Stay with cnn for continuing coverage of the deadly amtrak derailment in philadelphia. 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