The airport experience just prior to travelling gives you a clear reminder of where your place is and what your role is on planet earth, as far as the PTB are concerned. The reason this is particularly the case in an airport is because International travel is the closest most human beings can get to true and absolute freedom in this physical world. Upon entering airport security, you are literally 'herded' down several hundred feet of cordons, like sheep being herded by a sheepdog before coming out the other end, Lazarus like, into a glitzy, hyperreal consumerist 'heaven'; which gives you a final decisive assessment of your role as a human being on 21st century earth: a consumer.