Peter had this idea a long time ago: patches for your backpack to show off the three-letter airport codes of all the places you’ve visited. He’d like this because he’s been to a lot of obscure airports. I made some and set them for sale on Etsy, so check them out. I’ll make you whatever airport code you want. My folks were very excited to get ones for Calgary (YYC) and Sioux City (SUX).