our north america business correspondent samira hussain is at boeing headquarters in chicago. what is the latest from boeing there? it is hard to imagine a worse position for a playmaker to find itself in. its most importantjet has been grounded everywhere and so now the pressure is on boeing to find a fix and to do it fast. already some airlines are talking about compensation and with almost 5000 outstanding orders for these planes, this crisis is quickly becoming a costly one. just this week the playmaker has lost some £20 billion in market value. while there are questions for boeing, there are also questions for american regulators. historically this country has been at the forefront of aviation safety, but in this insta nce aviation safety, but in this instance the leading authority was playing catch up. thank you very