HARLOW: All right. CNN has learned that Boeing chose not to include safeguards on the Boeing 737 Max passenger plane that were included on earlier versions of that same plane that were used by the military. Our aviation correspondent Rene Marsh is with me this morning from Washington. If that's the case, why?</s>RENE MARSH, CNN CORRESPONDENT: Right. So, you know, Boeing says that these planes are nothing alike. That the size of the planes are different, they handle differently, the military plane is a refueling plane that has to be in the air a lot longer. So it is conceivable that all the controls on a military plane wouldn't be the same as a smaller passenger plane like the 737 Max. But the problem for Boeing is, the failure of this flight control system that we all now know as MCAS, has been linked to two of those fatal crashes. And the fix that Boeing is coming up with to prevent future crashes, will operate more like the version that they designed for the military. So the big question is, why didn't they do it this way in the first place? Just to back up a little bit, Poppy, Boeing built the 737 Max passenger jet without the safeguards that the U.S. military required for a similar flight control system on one of its military airplanes. So now that we know this, the big question is, why didn't they put those safeguards in on the 737 Max? They're going to have to answer to that to regulators as well -- Poppy.</s>HARLOW: Yes.
Boeing 737 Max Design Removed Earlier Safeguards.