let's now speak to the aviation analyst and consultant alex macheras. hello there to you, alex.ld have been watching this story and its developments very, very closely for we do now know that the two black boxes have been found. i think they have been retrieved as well. what are they going to be looking for from that data? the black boxes are going to be crucial if investigators are going to grasp a better idea as tojust what were going to grasp a better idea as to just what were the chain of events that unfolded in those final moments before, as the footage reveals, this aircraft came to a catastrophic halt, impacting with that perimeter wall. although we have so much footage available to us, i would argue that this is one of the most puzzling accidents ever caught on camera in commercial aviation history stub this is also south korea's worst ever aviation disaster. it has shaken the aviation sector there, understandably so, because they have a good safety record on the whole and the airline involved is the largest low—cost airline in south korea, operating often the world's bu