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when you go to barnes and noble just come with a picture id and you have to bring a paycheck stub.
You can certainly study at Barnes and Noble using the books on their shelves, but it's important to keep in mind that the store may not allow you to use the books for extended periods or bring in external materials like notebooks or pens. It's best to purchase the books you plan to use for studying to avoid any potential issues.
how much luggage am I allowed to bring
I guess so. But you surely can't bring canned food in you carry-on luggage.
can we bring our ps3 on hand luggage
No
Not legally in international flights.
If it is in your carry on or luggage.
Nope not in your carry on but you can put it in your check in luggage.
Sure it's not a liquid, so why not?
your luggage, money in case you have to eat there
don't bring liquids