Whether you need a visa or not depends on your nationality, not where you are travelling from.
German citizens do not need a visa for the USA. If you are not a German citizen you need to ask the question again.
It depends on your nationality. If you are a citizen of an EU country, then no. If you are a citizen of any other country, you may or may not need a visa.
Not for tourism and business purposes for a stay of up to 90 days.
It depends what country you are traveling from and what nationality you are.
Yes
no
May be Afghanistan is the only friend country for USA, in which US citizens need Visa to travel.
Travel document refugee passport convention 1951 need visa for Austria?
No you do not need a passport to travel from the us to puerto rico. you do need a visa.
No
No.
Yes, a Ukranian national would need a visa to enter the US.
No, you may enter South Africa for 90 days (leisure travel only)
Yes .
yes you do.
yes
Yes.
No, Dutch passport holders do not need a visa to travel to the USA. They can enter on a visa-waiver for 90 days. Any longer, or if they wish to work, they would need a visa.