International correspondent Jim Bittermann joining us from paris and cnn aviation analyst peter goels joining us from dallas. Jim, walk us through exactly what the copilot did on that earlier flight how investigators now came to the conclusioning that it was a rehearsal for what eventually wound up doing. Right. Exactly. Basically the earlier flight was the outbound flight from dusseldorf to barcelona and during that flight at one point, the pilot left the cockpit leaving the copilot lubitz in charge and he dialed into the setting on the autopilot, he dialed in the lowest setting, 100 feet. He had been ordered to descend according to air Traffic Controllers, descend from 37,000 to 35,000 and instead of setting it at 35,000 he set it to 100 feet and then just about a minute later, he again was ordered to descend by the air Traffic Controllers and they said to go down to 21,000 feet. Instead of setting in 21,000 he again set into motion the setting of 100 feet. So it was either a rehearsal or perhaps he was, in fact was going to try to crash that earlier flight and lost his nerve. Unclear. In either case the pilot came back and was unaware apparently of any of these changes that were taking place in the cockpit, wolf. Very disturbing. Peter, when he selected that altitude to go down to 100 feet shouldnt that have gotten the attention of air Traffic Controllers . Well it wouldnt have because he was in a descent, an ordered descent, so unless he went below the ordered altitude it would not have shown up. The only way somebody would have picked up on that behavior was some time after the fact downloading the data recorder and sometimes that occurs but there was no way this that this could have been picked up at that moment. What do the french investigators there who released this report think that copilot was hoping to learn during that socalled dry run, that rehearsal, if, in fact, it was a rehearsal . Well theyre not going to tell us. We just had an interview just a short while ago with the head of the dea who was responsible for that preliminary report and he said they just dont have an idea of what was going on in his head but its clear that he had gone through this pattern before. Thats what makes this chilling is that if there was any kind of possibility that anybody was aware before the fatal crash, if there was any awareness that he had this intent then that would really sort of change the perspective on what happened in the crash. There apparently is none of that. We know jim, that when he eventually did crash into the french alps he locked the door when the pilot went to the went to the mens room and left in the rehearsal if you will the door was not locked. Is that right . It was not locked and the pilot came back and just before when the pilot buzzed the buzzer to say open the door in fact he dialed back the right the correct altitude into the autopilot so, in fact, he had he reset it so the pilot would not be aware, we assume that the pilot would not be aware he had been playing around with it. Does this suggest there should always be two people inside the cockpit, when one pilot or copilot has to leave, somebody else should go in there, based on what weve based on the experience of this ill fated flight . Well thats certainly the most obvious first step wolf is you have to have two people in the cockpit. But one of the indications that the investigators are taking a new look at cockpit security they indicate that as part of this investigation and this tragedy tragedy, they are going to look at the post9 11 procedures about how do you secure the cockpit, how best to protect passengers should the procedures be revised. Thats going to be part of this investigation when it comes out over the next year. And it certainly strengthens those, peter, who have called for cameras inside the cockpits video cameras, Live Streaming if you will at all times. Thats been on the thats technically theyre technically capable of that but pilots have resisted right . Thats right. Its been a recommendation from the ntsb for years. Pilots have resisted it. Pilots continue to resist it although i think theres going to be some real dialog in the next six months about this. What happens, jim, next in this investigation . Well, its just about what you were just talking with peter about, the fact that the head of the accident investigation authority, will be bringing in all the details they can about the pilots Mental Health the copilots Mental Health and background what kind of drugs he was taking. They dont think theres going to be change in the major parameters of the crash. What we know about the crash now is what apparently happened. But they do want to have all the Background Information and then they are going to come up with a set of recommendations about what should be done two pilot rule in the cockpit, all sorts of other change in the locking mechanism, for example or other kinds of things that might be done to prevent this kind of thing from happening again, wolf. And peter, Andreas Lubitz the copilot did suffer as we know bouts of depression. This ill fated flight what happened 149 People Killed and the copilot himself, apparently committing suicide, has it affected the way airlines around the world are handling the issue, sensitive issue, of Mental Health of pilots . Well there have been no changes yet, but there are dialogs taking place, both, you know the Pilot Community is deeply concerned about this. They want to make sure that theyre protecting their members members, but at the same time they have a special obligation. And how thats addressed in the coming months will be critical because people have a right to know that people who are in command of their aircraft are of sound mind sound body that theyre going to do everything they can to get the flight there safely. As you know also peter, weve discussed this over the years, there is the technologies available right now, all the information, that goes into those two socalled black boxes, the flight data recorder the cockpit voice recorder all that information that winds up there, then they have to search for the two black boxes, they are capable of streaming all that information some place so you dont have to worry about finding those black boxes but been resistance on the front as well. Tell us why . Well the i means the air carriers worldwide are resistant to change. Particularly when you have an accident like this that they view as its a one in a million, its a one off. The reality is you could have streaming, you could set up parameters in which the streaming only begins when the plane is out of its flight parameters out of its approved flight plan then it starts. It sends out alerts. I think its overdue. It ought to be done. Yeah the technology is clearly there and i think the pressure is going to intensify. Jim bittermann and peter goelsz thanks very much. The investigation into a terror attack in texas zeroing in on a series of tweets between one of the gunman and the man, an isis recruit from the united kingdom. A closer look at how big of a role he may have played in sundays attack. New polls on the 2016 president ial race here in the United States. Theyre showing good news for Hillary Clinton. Some challenges ahead for jeb bush. Stay with us. To the texas terror attack. The terror group took responsibility but thats not been confirmed by investigators. The investigation is centered on two individuals who tweeted with one of the shooters elton simpson, one is in syria, the other one in somalia. Joining us from london terrorism analyst paul crook shank and our correspondent atika shubert. Lets start with Junaid Husain. What do we know about him and his pa past . Hes a convicted hacker and really the only established hacker whos gone claims to have gone to jar to fight for isis. Convicted of computer offenses in 2012 for publishing the address book of tony blair, but also for hacking into the antiterror phone lines of mi 6, the u. K. Secret service. Its hes an established hacker but what makes him unusual his Online Presence is that hes always online, popped up numerous times under a number of different accounts and always cheering on these attacks including this most recent attack in garland, texas. Apatiently why u. S. Investigators are looking into what degree he may have had in either inciting or instigating that attack. Ive spoken to a former hacker who was part of his hacking team in 2012 and he described Junaid Husain as a sort of volatile individual bit of a prankster, and but he grew increasingly worried when he had his last phone conversation with him in syria and he fired off several automatic weapons. He described him as a dangerous individual. Paul what else do you know about this guy, Junaid Husain . Well we know wolf he went to syria in early 2013 that he connected with isis there, hes helping them try to hack isis enemies overseas. He was linked to that sort of death list they put out in march where they listed all the United States personnel. We know he was late to that wolf because he posted that from his twitter account. [ screaming ] were hearing extraneous noise over there. Whats going on . Basically, i mean were in the middle of karn na by street with an area with a lot of people and as you know theres also an election happening here in the uk. I think thats attracting a lot of attention. So thats where that extraneous noise is coming from. But as the election continues, this is going to be a concern but also Security Issues and this is why things like Junaid Husains twitter account is being closely followed by investigators. Thats right, wolf. Isis british fighters have called for attacks in the u. K. Against polling stations here certain amount of tension here in various forms leading up to the election. All right. Were going to leave you guys alone for now. Well get back to you, obviously theres a lot of excitement in the uk. The election is coming up in the next day or so. So were going to be having update on whats going on in the elections. Thats coming up later this hour. Atika shubert, paul crew shank, thanks very much. Coming up the controversy in the freddie gray case here in the United States. One of the Police Officers charged in this death, challenging the prosecutor over the knife gray had when he was arrested. Was that knife actually illegal. The answer be may come down to a single spring. We got the new tempurflex and its got the spring and bounce of a traditional mattress. You sink into it, but you can still move it around. Now that i have a tempurflex, i can finally get a good nights sleep. When i flop down on arrested. And its just like, ah, this is perfect. Wherever you put your body it just supports you. Like little support elfs are just holding you. I can sleep now through the night vo change your sleep. Change your life. Change to tempurpedic. We go next to baltimore, maryland where emotions are still raw after the death of freddie gray. The big question today, centers on the knife gray was carrying at the time of his arrest. Was it illegal . Two of the six Police Officers charged in the case insist it was and theyre challenging the prosecutor prosecutors claim gray was arrested without just cause. Athena jones joining us live from baltimore. Lawyers for the officer edward near ro and Garrett Miller requested to see the knife. Whats the distinction between how the officers and the states attorney Marilyn Mosby are describing the knife, whether it was legal or illegal, for freddie gray to be carrying that knife at that time . Hi wolf. Of course the question of whether the knife was legal or illegal is important because if it was a legal knife as Marilyn Mosby is arguing the officers didnt have a right to arrest limb. The lawyers for the two arresting officers say this was an illegal switch blade, illegal under the law here in maryland. They are demanding the states attorney the Police Department present this knife, produce the knife, so they can examine it and prove that, in fact, it was he was not allowed to be carrying this knife. Of course i spoke with a former prosecutor here who told me if it turns out that knife was illegal it could complicate the case at least against these two officers. So thats the issue they are bringing up. Of course it could take several weeks, if not longer to get a word back from that judge, a response on whether they will get to see that knife. Are there different rules . We had been told i dont know if this is true, theres one set of rules for that knife in the city of baltimore, another set of rules in the state of maryland or county of baltimore . Have you looked into that . I did ask a former prosecutor for the States Attorneys Office whether there was a disparity and she said she hadnt examined the law. She suggested there are sometimes different rules applied to the city versus the state and whats interesting here if thats the case in this particular case then the states attorney chose what rules to follow. She was able to select the rules governing Baltimore City. Its a little complicated in terms of the weeds, but the bottom line a lot of questions about the knife and whether or not it was legal. We, of course, havent seen it and so were not going to know the answer to that until that knife is produced. The mayor also requested, as you know a new investigation by the department of justice here in washington. Theyre already looking into whether freddie grays civil rights were violated. What does the mayor want . What is her request from the federal government right now as far as the baltimore Police Department is concerned . Right. This is a big deal, wolf. As you mentioned the d. O. J. Is investigating the case of freddie gray. The mayor wants to see the Justice Department investigate the entire Baltimore CityPolice Department to look into the patterns and practices of the Police Department, to determine if police have been violating the rights of residents. For instance violating the their Fourth Amendment rights against unreasonable search and seizure, an important civil right. She wants to have them look into that. This is similar to the patterns and practices investigation that the d. O. J. Conducted in ferguson, missouri. The officer in that case wasnt indicted but the department of justice did investigate the entire ferguson Police Department and, of course the municipal courts there and found that there was a pattern of civil Rights Violations so if the d. O. J. Decides to go forward on this they are actively considering whether to open that investigation, it will be a big deal and also take a long time. This is a much bigger Police Department, of course, than the one in ferguson, missouri. Certainly is. The mayor also made an announcement regarding body cameras. Whats her plan . Her plan she said was to have body cameras implemented here in the Baltimore CityPolice Department by the end of the year. Now i, of course asked how soon would body cameras be on every single officer. She said she didnt want to set any false expectations. Shes ordered her people to cut through any bureaucratic red tape there could be to fast track these body cameras. But its unclear at this point how wide reaching it will be by when. She said it would be the Biggest Program of body cameras of any department in the country. They want to study it and do it right. I should mention next week next tuesday, the governor of maryland larry hogan plans to sign a bill that would allow study of these body cameras so this is something they want to move on not just here in the city of baltimore but across the state. Wolf . All right. Thank you very much athena for that report athena jones reporting from baltimore. What a difference a day makes. Brand new poll Shows Hillary clintons growing more popular despite the controversy over the controversies over the last few weeks. Were standing by and well explain whats going on when we come back. If you cant put a feeling into words, why try . 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