The only carpet in the world that has a cult following. Keep it weird, Portland.&nbsp;  1.  A Brief History of the PDX Airport Carpet   2.&nbsp; How Portland Airport Became a Hipster Icon   3.  Portlanders Struggle to Say Goodbye to Airport Carpet   4.  Portland's Messy Breakup with its Airport Carpet   5.  You can buy some if you're so inclined.&nbsp;