Are you allowed to lock your luggage?

Related questions

1. What is through check in baggage?
2. Is laptop bag allowed in Qatar Airways?
3. How much baggage can I take on Qatar Airways?
4. Do TSA locks work internationally?
5. Can someone else pick up my luggage?
6. Is a 1 hour layover enough?
7. Should I have a luggage tag?
8. How many check in bags allowed in Qatar Airways?
9. Do you get your luggage on a layover?
10. Can I carry a backpack and a carry on Emirates?

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20. #present