United said it had this woman's missing bag. She tracked it to a residential address

Most of us know the travel fear of a bag not appearing on the belt after a flight. Some of us -- ever more, thanks to the aviation chaos this year -- know the gut punch of it not appearing. But an increasing number of travelers know what it's like to lose a bag and get it back -- not because of airlines' diligence, but because they knew their bag's location thanks to a tracking device they'd packed with their clothes.