<Li> Boeing Shared Services Group <Ul> <Li> Boeing Realty </Li> <Li> Boeing Travel Management Company </Li> <Li> Boeing Supplier Management </Li> </Ul> </Li> <Ul> <Li> Boeing Realty </Li> <Li> Boeing Travel Management Company </Li> <Li> Boeing Supplier Management </Li> </Ul> <Li> Boeing Travel Management Company </Li> <Li> Boeing Supplier Management </Li>

Airlines in other countries buy airplanes from boeing because