This week on The Travel Detective, if you’re like me, you believe there are only two kinds of airline bags: carry-on and lost. So where do those lost bags end up? A lot of them travel to a small town in Alabama where the bags and their contents are all for sale. I’m going to tell you how they got there and what’s in those bags — that’s our cover story. Plus, a study that will literally take your breath away, but for all the wrong reasons; I’ll tell you which global cities have the worst air pollution. And then it’s the hottest place on Earth with a nearly century-old gem to cool it all down. Correspondent Kerry Sanders visits the Oasis at Death Valley featuring not one but two hotels with the past. I’m Peter Greenberg. All this and more on the next edition of The Travel Detective on PBS. Check your local listings.