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Ever enacted the code that would have allowed him to get back inside and that the pilot inside the cockpit would have had to actually override the toggle switch to keep him out. we're not hearing any of that yet, sean. it will be interesting to hear if we to. >> why would he change the altitude? they had a cruising altitude of 38,000 feet. he wouldn't have changed that normally on his own without the pilot's permission, right? >> that doesn't seem like a normal thing to do sean. >> thank you so much. joining me now with more reaction aviation expert attorney brian claypool and attorney sal. sa...

Divergent points and it's been interesting seeing so many european carriers including lufthansa saying they will align around the stricter safety rules such as the two people in the cockpit rule that the u.s. uses. i wonder why there isn't more align men between u.s. and global regulations. flights cross between jurisdictions. should there be more of a global regulatory approach to this? >> i think there should be one level of safety. we have essentially one level of safety in the manufacture and certification of erik. the major airline manufacturers all have to be certified and they have to m...

Intelligent systems in place, though that monitor certain parameters on the airline like the a320 has an angle of attack protection mode that it monitors and regardless of the pilot inputs on the control, does not allow them to exceed a certain angle of attack. and it's relatively easy as a software engineer to conceive of and implement similar code that would restrict them to certain bounds around their planned flight path and to have air traffic control and the company, monitor that. and if they do need to go outside of those boundaries then air traffic control and the company can allow them...

Attorney brian claypool and attorney sal. sal a lot of this doesn't make sense. i look at the a320 and in a post-9/11 world and they have all the controls. you can actually drop a grenade and you're not going to be able to open that door. here's what i want to know do you suspect as the prosecutor does that he did this consciously? he drove this airplane into this mountain? >> i think in one way or another most of us on tuesday were thinking that. there's not too many natural ways an airplane does what this airplane did. he had to actually keep the pilot outside of the cockpit door by holding ...

But as we've seen in this case it kept people out who needed to get in. >> gary tuchman joins us now. gary so is there a manual way too lock the door? how does it work? >> reporter: yeah there's some old fashioned technology on the 737. i'll show you. it's a dead bolt. like to see in your apartment or house. the way this works right now, it's unlocked in this setting. and then when you take this and move it into a plus it's locked but then you can use a key on the 737 and it will open the door. and then there's one final setting and that is the locked key inoperable. you will not be able to ge...