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Twenty years ago, no traveler would have ever had to consider how to pack a backpack and skip the baggage fees. Packing for a flight was a lot simpler. After all, just by purchasing an airline ticket, you’d have the right to a checked bag and a couple carry-ons. Things have long since changed, though. First came the checked bag fees — airlines began adding them in the mid- to late-2000s as a way…
