The US Department of State issues US passports!
STATE DEPARTMENT
U.S. Department of State. :3
40%
Yes, if they are born in the US, they are US citizens.
There is no "US Fish and Wildlife Department." I must assume that you mean the US Fish and Wildlife Service, which is part of the US Department of the Interior.
The US Department of Justice (DOJ or Justice Department) is headed by the Attorney General.
Department of the Interior
The U.S. State Department.
State
Passports are not required for travel inside the US. Anyway, non-citizens, legal or not, are not eligible for US passports.
No. The law varies depending on the situation.
Yes.
Different countries have different agencies for this function, however it would be a government department that would do so. The US Department Of State is the one that caters to these two specific needs in the US. Foreign nationals who want to move to the US permanently or temporarily need to first obtain a visa from this department. They need to file in their visa applications at the US Embassy in their respective country, get cleared in a personal interview with a Consular officer and then get their visas approved. In case of passports, only US citizens are eligible to apply for a US passport and they can do so at the same department itself.
No. Citizens of the USA are not allowed to maintain another citizenship. New citizens of the USA have to give up their previous passports.
Many American citizens and their dependents hold US passports. WikiAnswers cannot provide information on private individuals who have US passports, unless the specific question is asked about a celebrity or political figure.
They are US nationals meaning they can hold a US passport; but they are not US citizens which means there are certain limitations for them (e.g. taking high positio federal level jobs or vote in presidential elections)
Bureau of Consular Affairs (CA)
US Citizens are now required to have passports (or equivalent documents) when entering the US as a means of confirming that they are, indeed, US citizens. If you tried to enter without a passport you would likely be detained while your status was determined.
No. Since St. Thomas is part of the US Virgin Islands, and thus is a US territory, US citizens do not need passports to visit.