Try to get everybody back on the same page with what we know so far. It begins at 12 41 local time on the morning of the 8th. Flight 370 takes off from kuala lumpur bound for beijing. At 1 07 a. M. , with the plane over the gulf of thailand, the final stream of information from the 777s acars data recording system is received on the ground. From that last transmission, investigators determined that someone has programmed in a change into the planes navigational computer. Then at 1 19 with the airliner at cruising altitude the first officers utters four word leaving malaysia air space telling controllers all right good night. Two minutes later the transponder cuts out or is turned off make it hard for ground radar to track the plane. Thai military radar is following it. Somewhere around 1 28 a. M. Detects that left turn toward the Malay Peninsula to the west and south. At 1 30 a. M. Air Traffic Controllers lose contact with the plane. A scheduled 1 37 acars transmission does not happen. They detect what they believe to be 370 miles northwest of penang. According to a satellite ping received at 8 11 in the morning investigators say the jet either turned north or south and flew into those two huge, an of territory into open ocean. Investigators are focusing closer on that southern route. A Major Development one that everyone hopes will finally bring some badly needed answers. More now from kyung lah in kuala lumpur, malaysia. Reporter a mothers grief and frustration finally boiling over. Relatives of the missing passengers today storming into a normally subdued briefing room, demanding answers. After about five chaotic minutes, she and others are dragged out by malaysian officials. The malaysian government says they regret the incident, but the reality is neither they nor anyone seems much closer to solving the mystery of what happened to flight 370. Could a clue be found in the pilots home Flight Simulator . Malaysian Authorities Say data from the simulator was deleted on february 3rd, more than a month before the plane went missing. The fbi today saying it has sent a copy of the simulators hard drive to its Forensics Lab in quantico, virginia, hoping to recover the deleted files. The malaysian authorities also disclosed a tantalizing detail. They have new radar information about the planes path, provided by another country. What exactly it shows the malaysians arent saying. Meanwhile, operational crews are beginning to narrow their search, believing its more likely the missing jet traveled along the southern corridor, away from the heavily popula populated asian continent. Investigators say theyre focusing on an area roughly the size of new mexico, about 1600 miles off their southwest coast, using what information they know about currents and the planes possible last position to make an educated guess on just where it might be. We are going to talk to a u. S. Navy commander in that region. Kai you kyung lah joins us. You were in the room with heartbreaking pleas from families of passengers. Are they feeling that same frustration, that sense of just kind of anger . Reporter that anger and anguish, yes. Thats felt across all nationalities, all the families here. And while it is a mystery for the rest of the world, for them its very much about the loss of human life. This mystery about whats happened to fathers, sons, mothers, daughters. But as far as what that other woman said, calling the malaysian government liars, we havent heard that from the people who are malaysian citizens. Because frankly we havent had any access to them. As far as the chinese families, they absolutely feel that across the board, were hearing it out of beijing and here. They dont believe the malaysian government has been transparent at all. They feel they have botched this investigation. The government for its part, anderson, saying that the best way that they can help these families is to simply find the plane. Kyung, appreciate the reporting from kuala lumpur. Later on in the program im going to speak to the family of paul weeks who was on the plane and was on the way to a new job in mongolia. Hes an engineer. He actually gave his wedding ring and watch to his wife in case something happened. Im going to talk to his brother and sister about that. I want to bring in evan perez breaking the navigation story for us tonight. Some of this can get really technical, evan. Just to start with explain exactly what a waypoint is and what is significant about this information were getting. Think about your gps. You can enter longitude and latitude in your gps to try to direct you, navigate you to a particular place. Now in the sky for pilots, they also have to include altitude. So essentially its a place in the sky where a pilot can direct to direct an aircraft and the Computer System on board the aircraft to take the aircraft. And so the navigational systems on the plane essentially uses these five digit codes to direct where to take the aircraft, anderson. So explain the breaking news on this tonight. What is new that we now know . Well, one of the things that weve been wondering is how the investigators know that the aircraft deviated from its course. We know there is some radar. But how can they know with certainty . We know that the investigators have discovered that the aircraft went to two specific waypoints away from the course thought was scheduled to go towards beijing. So what they believe this indicates is that whoever was doing this, whoever moved the aircraft off its scheduled course, specifically was directing it to these particular waypoints. Again, away from its scheduled course. If it was being manually flown it probably would not have headed to these waypoints, is that correct . Its the understanding the investigators are looking at. Now when a pilot normally turns an aircraft using the yoke, they feel if somebody was manually turning the aircraft it wouldnt specifically go to these particular waypoints. So they believe this indicates perhaps that someone with some skill, someone who had some knowledge, entered these waypoints for the aircraft to go to these particular places. And then of course it disappears. It doesnt answer the final question that we all have which is who did this, why and where did the aircraft go after it disappeared, anderson. And when were these entered in. Evan perez, appreciate it. The question was it pilots doing their jobs or someone up to no good . With us former cia Counter Intelligence expert and others. Im confused by these waypoints and what the significance of the idea of having these two waypoints is. Can you try to explain it . Reporter a waypoint really is a definition of the route in the sky. Thats something that somebody would enter in. Absolutely. But two particular different ones . We keep going back to there were two particular waypoints. I dont see where those waypoints came into play on this. I see the airplane might have been directed toward them. As a matter of fact, i looked on an en route chart to try to find the waypoints that allegedly they turned toward. I still contend that the way poipt th point they were headed for was a diversionary airport and programmed in by the pilot. Thats conjecture. I may fall on my sword on that one. But i dont see where the acars machine could actually i know through our dispatch process where they would know exactly what was put into that machine. They just dont know. Thats not information they utilize or is helpful to them specifically. And jeff, the fact that this pilot deleted information from his simulator, you can look at it with a nefarious interpretation of that or hes an organized guy. Hes clean up his files. What do you make of it . We only have part of the information on that. In order to determine whether it was nefarious or not or benign we need to know the other part. That is were there other flights on that simulator that he didnt delete. So in other words, whats left on the hard drive of that simulator and what is absent on the hard drive of that simulator. If only selective routes have been taken out of it, only a portion of his experience on the simulator has been deleted, then that makes me raise my eyebrow and says i find it difficult to find a benign explanation for that. Les . I understand your point, jeff. But the way im looking at it is from the standpoint of maybe there was a flight that pilots are organized people. And they feel that maybe the hard drive is going to take too much room and they delete a particular flight. But on a humorous note it might have been a profile he might have been practicing for his recurrent training and just a profile because this is not the kind of thing you can really do. But he may have deleted it because he was embarrassed it didnt go well or something to that effect. Its open to interpretation. Mary, youve been involved with the fbi in these investigations. Are there circumstances where they couldnt retrieve the data because now the fbi and quantico willing be looking at it . Yes. In instances where someone has erased it and knows how to do it effectism. You dont just erase you overright or destroy certain things. You have to not just erase it but take extra pains. That too might be very interesting to show how they have overwritten it or erased it or deleted certain things. When i was Inspector General we worked aviation crimes with the fbis aviation crimes unit. And we many times had to recover computer data. They were pretty good. So i would bet on the fbi. I think they will be able to get whatever was on there. I just have to believe theyre going to be able to see what those files were. Unless and i would be surprised to learn this unless this erasure was so good and competent it wasnt just erased but overwritten. How long will this take . Youre talking about hours and days rather than weeks and months. Theyve got a tremendous capability. But remember just as in this case weve had countries who have been reluctant to share with us their radar information because it shows what their true capabilities are, the United States if they have information that tells us well no goodwill come of it, we cant help those missing by releasing this in such a way and show or capability, they may not do so. I would hope that they would err on the side of getting that information out there. But we too have to protect our capabilities. Mary, you raise an interesting point. That even if they cant find what the information thats been overwritten, the mere fact that information was intentionally overwritten can be meaningful. It depends what the erasure is. All of us who have Flight Simulators, you want to land, try to see if you can land. Most of us dont do it successfully. But you want to try to see if you can land at the weirdest places on earth. So just flying around the earth and seeing different places might not tell us much of anything. Thats what you do with like a microsoft Flight Simulator. Where they went, what was there, what wasnt there, whats missing, the pains taken to take it away, if anyone else was on the Flight Simulator. All those things. Im pretty confident if its there to be gotten that the fbi will get it. Theyre just so good at it. Jeff, the fbi is also were told analyzing the copilots computer. You see a number of sort of cumulative acts, operational acts. What do you mean by that . What i mean by that, anderson, is nothing significant in the crime or terrorism world happens without some planning, casing and the act itself if youre going to be successful. Those are the operational acts that lead up to a Major Incident or terrorism crime. Rehearsals on the Flight Simulator might be interesting to go back and see what other routes had this chap captain flown in the months and weeks prior to this particular incident. On the simulator you mean. Or in real life. What other trips has he taken. Why as a senior captain did he bid the Airline People will know what im speaking about that he bid this trip. Was this a good trip for a captain with his seniority or was this kind of a dog of a trip but he bid it . That could raise questions about to, okay, theres not a good reason for him to take this trip. There must be Something Else afoot. Mary, do you agree with that . Yeah. But theres a really important point, too. He makes a great point. Because just flying on the simulator we can all fly weird places on the simulator. But you would have had to have gone there to make the contacts. Because whats the point of knowing how to land someplace if once you get there you cant do anything with yourself, with the plane, with the plot. So there has to be more than that on the computer. There has to be additional contacts. By the way, since it was the copilot who spoke last and whose voice sounds normal, what we also want to know is much more information about him and is this how he spoke to air Traffic Controllers . Other people who fly with him need to provide a lot of information about him. Hes the only one we know thats living and talking when the turn is made. Again, though, mechanical anomalies is still very much at play for investigators. Thats something were going to look at tonight as well. Jeff beaty, good to have you on. Mary schiavo as well. Les abend will stick around. Two colleagues will run through all the evolving scenarios investigators are look at now including some youve been tweeting us about. Tweet us using ac360. Follow me andersoncooper. Next intensifying focus off australia. Were going to hear from a commander in the u. S. Navys seventh fleet which has planes and vessels in the area. Later well dig deeper into the possibility of a fire on board and parralels to the crash of swiss air flight 15 years ago. What can we learn from that flight that might be applicable to this. Well be right back. Ameriprise asked people a simple question in retirement, will you outlive your money . Uhhh. No, that cant happen. Thats the thing, you dont know how long it has to last. Everyone has retirement questions. So ameriprise created the exclusive. Confident retirement approach. Now you and your ameripise advisor can get the real answers you need. Well, knowing gives you confidence. Start building your confident retirement today. More than a new interior lighting system. It is more than a hot stone massage. And more than your favorite scent infused into the cabin. It is a completely new era of innovation. And the highest expression of mercedesbenz. Introducing the 2014 sclass. The best or nothing. President obama weighed in today on the search for flight 370 and the uniteds role. We have put every resource we have available at the disposal of the search process. There has been close cooperation with the malaysian government. And so not just ntsb but fbi. Anybody who typically deals with anything related to our Aviation System is available. And so our thoughts and prayers are with the families, but i want them to be assured that we consider this a top priority and were going to keep on working. And chief among the hardest working people on the planet tonight members of the u. S. Navys seventh fleet in that southern search area off australia on the ocean and above it using resources that can track anything. Commander march, i know you cant comment on reports about indonesia not allowing u. S. Aircraft to fly over air space today. But i want to ask you on this southern route, to you is that the most hopeful . Is that the most important area to search now . I think you just have to look at the areas that have been researched. So we first covered the gulf of thailand. We completely saturated that. We moved to the andeman sea. We penetrated deeply into the bay of bengal. Thats from our side because the indians were flying over there, too. I think really its simply a matter of this Southern Area has been searched the least. So were out here and australia is out here. And at this point thats all you can do. You find the areas where you havent looked, where there may have been information that came from satellites whether thats military or governmental or commercial, and you go to those. And so thats what were doing. If you are able to find debris, does that automatically mean that you would be able to figure out where the plane went down if in fact the plane did go down in the water . Would you be able to automatically figure out based on tides and time . Great question. An the currents and the wind and the sea state plays such a huge factor. Being so long from that initial flight takeoff, its such a huge variable. So what we normally do in the u. S. Navy, when we come upon this situation we immediately launch a helicopter and we establish a Central Point where we think the last known contact was. Thats called a datum. So from this datum we calculate the currents and the winds. And that is why these search areas slowly expand. And so for what we usually do for a search and rescue you look at that first 72 hours. It can grow fairly big but within your helicopter range. Well, now that is completely a different scenario. And the current and the winds and the set and drift on there play a huge factor. We can track that slightly we can drop a sonar buoy and get a kind of a gps position that tracks the environmentals, but its such a long period of time it is certainly a huge factor. And really no one can say if a piece of debris started in one area where it is ten days later. This may be a dumb question, but are you still hopeful . Are you losing hope . With each day that passes by this gets more and more difficult. You know, this what is we train for. And our pilots, our air crews, even our maintainers on the ground, our mission is to fly these planes and to search. And the way i think of it personally is, each of those people on that aircraft, they have families associated with them and friends. And i know they want closure no matter what happens. And i know if it were me and my family id want the u. S. Navy out here looking and thats what were doing. Commander marks, im glad youre out there. Thank you. Youre welcome. Thank you. Incredibly difficult task right now. Digging deeper, i want to bring in a veteran of these kinds of things, david gallo coleader of the search for air France Flight 447 also retired Airline Pilot ron brown. David, you heard the commander there saying theyre searching off the coast of australia because theyve already basically thoroughly searched the northern part of the indian ocean. Do you basically just keep on expanding out until theyve searched the entire area the plane could possibly have reach