job properly everyone perished on board. in this case there was time for the pilots to take corrective action if that was indeed the problem. i think that would be more likely a problem. as les mentioned, most of the doors are plug doors. it would be very difficult for them to open. in this particular model of aircraft there's an external cargo door that does maintain pressure. we've seen that door fail the seal on that door fail before. when that seal fails, it can cause a slow decompression but nothing explosive or extremely rapid. >> okay. so a lot of possibilities that could lead to this pressurization problem. thank you all very much. we're going to stay on this. again, if you're just joining us there was a pressurization problem on board this flight that had left chicago heading to hartford connecticut. they had to divert to buffalo, new york. one person unconscious. we're working to figure out