it's one more step towards taking charge of your health. so every day, you can say, ♪ youuu did it! ♪ with centrum silver. welcome back. ntsb investigators are releasing new information about the alaska airline boeing 737 max 9 that lost a portion of its outer wall shortly after takeoff. their focus is now on something called the door blog. that flight full of passengers thursday evening when an exterior panel blew out. fortunately, only a few minor injuries were reported. i should say, it's miraculous. i want to bring in now nbc's natasha griffin to talk more about this. what do we know about this, this door blog, dana, and how this all happened? >> reporter: yasmin, this is a modification for this particular model of the boeing 737 max 9. so, it looks like an exit row on the outside. but on the inside, do