a manufacturing flaw, the ntsb is going to want to find that and get that information out to other operators. maybe the engine was nearing its %-pk like an old plane, but it's difficult for had he to see the screen. that's what they're going to be doing, and of course their first concern is always the safety and the lives of people on board. >> we'll watch these pictures from our affiliates . christopher johnson is with us. i want you to take us back as we hear from our experts about how these things play out. you said you were at about 35,000 feet when you heard a bang. the pilot came on and said there was a problem. just walk us through, you said it was a drop in altitude and