If you're a US citizen, they have to let you in – eventually. In the meantime you may be sitting in a room without access to your phone. With customs everywher

If you're a US citizen, they have to let you in – eventually. In the meantime you may be sitting in a room without access to your phone. With customs everywhere, you're usually better off answering their questions without asking why they want to know. Coming back from a visit to family, they wanted to know my three sisters' ages among other irrelevant stuff.