No. If he is an American he must have a valid American passport.
in order to leave or return the US you must have a passport.
No. Your passport comes from the country in which you are a citizen. If you're not a UK citizen, you shouldn't have a UK passport no matter where you live. If you've got dual citizenship (your parents were US citizens, but you were born in the UK, or vice versa), then you're not required to have passports from both countries. It's usually more convenient for your passport to be from the country you actually live in (especially if you plan to travel outside it and return), but it's not, strictly speaking, required. What you need from the country in which you're living is not a passport but a visa. Unless, of course, you're a citizen of that country as well, in which case you just need proof of citizenship; a passport is only one form of such proof.
You'll need a US PASSPORT to return to the US.
I live in the USA with a Green Card but am a citizen of the UK and a UK Passport holder. I am thus to the USA/US Immigration a foreign passport holder.
Yes. You always have to have a passport that's valid past the return date when leaving the US, since you can't enter the US without a valid passport.
It depends on where you want to travel to...If you are goin to the UK you can enter with your British Passport. Also you should be fine to travel within the European Union with the same British Passport. Your Green card will give you entrance back into the US when you return.
The question is: Did he lose his passport for trying to evade the service in the Greek military?
If your passport has been stolen, you won't be able to travel.
Yes, you can.
A passport.
yes Yes, out of border lines of the US you need a passport for alot of different places.
If you are born in UK, then probably yes she can. Following website has list of countries and under them are procedures which can help you out. Website : www.wikiprocedure.com