Unlock Mode News Today

To lock out the one person who might have been able to thwart this disaster the planes captain. want to bring in cnn aviation correspondent richard quest. richard, first, walk us through what these doors are supposed to do and how they are supposed to work. >> right. in doing so let me preface what you are now going to hear is talk about, we are not going to give away any great secrets. there is going to be no great revelations. everything is pretty much public knowledge and easily discernible. ...