let's speak now to the business leadership expert chris roebuck from the ucl school of management. michelle was explaining the latest edges for boeing. it's really serious, this, isn't it? i edges for boeing. it's really serious, this, isn't it? i don't know why — serious, this, isn't it? i don't know why am _ serious, this, isn't it? i don't know why am laughing. - serious, this, isn't it? i don't know why am laughing. i - serious, this, isn't it? i don't. know why am laughing. i don't serious, this, isn't it? i don't- know why am laughing. i don't know what to say. something happens at boeing and you just think, i mean, this has been going on for six years now. you just think it cannot get any worse. but they managed to come up any worse. but they managed to come up with something that is worse. the fact that records might have been altered on the process recording of quality for aeroplanes, the 787, is mine glowingly worrying. boeing say, ok, we have checked all the ones on the production line, yes, but what about the ones that have left the production line and are out there?