But cash is everywhere, and it's not illegal to have it in your luggage if declared or below a certain amount. Seems like you'd get a ton of false positives as

But cash is everywhere, and it's not illegal to have it in your luggage if declared or below a certain amount. Seems like you'd get a ton of false positives as it would be very difficult to train a dog to only alert if it smells a lot of cash. But I did read another article that said they sprayed their vacuum packed cash bags with coffee and air freshener - don't know if that works that well against cash sniffing dogs.