Several countries will not allow you to enter or may make entry more difficult (Syria, Lybia, Iran, etc.). Also, acquiring a visa will be more expensive and/or difficult in some countries. For instance, it is much more expensive for a US citizen to obtain a visa to enter China than for someone from an EU country, South Korea, Singapore, or a number of other countries.
definitely after 9/11. laws are more stringest and places that used to not require a passport now require a passport.
Having a passport and/or Visa is a legal way to enter the U.S. from Mexico.
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i take it you mean the UAE its 6 month for british held passport so i say the same for US ..
Does a Bangladesh Passport holder having USA Green Card need tourist visa for Cambodia
No.
What are the disadvantages of having a network in an office?
US citizenship.
Passport is a requisit.
No, a US passport does not display an address on it.
No, a US passport does not include your address on it.
Having your passport securely and always with you during any kind of trip is of utmost importance. One simple way to do this is to have a passport wallet, which is basically a protective cover for the passport.