Likening airport terminals to marketing microcosms, Ad Age has paid Greg Lindsay to spend three weeks traveling the globe to report on the inner workings of airport terminals. Called “Airworld,” the project aims to examine airport’s “vast media and retail ecosystem” and dig into the “largest coherent stand-alone marketing venues on earth.” It’s not exactly a glamorous assignment but it just might lend a bit more insight into the inner commerce of airports than the Tom Hanks movie Terminal.