I thought this was interesting considering the ongoing debates over what you can carry on. The article also mentions medical needs.
http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&node=&contentId=A40148-2001Sep28
http://www.washingtonpost.com/ac2/wp-dyn?pagename=article&node=&contentId=A40148-2001Sep28