No, you can only be married to one person at a time.
If the marriage is legal in the other country, they are married everywhere in the world.
He married in another state and didn't know he was still legally married to someone else
If you are married under the laws of another country, you are considered married throughout the world. If you have one wife, you cannot legally marry another. It is bigamy and is against the law in the United States.
As long as you have the legal documentation to prove you are married your marriage shoud be held valid in any other country. (there are some exceptions; for example in some countries polygamy is legal, but not in others)
No. I don't think it would be legal. I know people go to Mexico for divorce, but there is special paperwork and requirements that they meet. But, if you wanted to go to Germany for divorce I don't think you could. The laws there are German, not American law.
Your marriage in Pakistan is valid in the US, if someone is married in another country, they cannot get married again in the US or vice versa. The second will be void.
No
No. Civil Courts, with the exception of immigration courts are limited to legal citizens, aliens and those legally in the country.
First of all, the second marriage is not legal, meaning she is not legally married and will receive no benefits as a legal spouse. Also, if she is found out, she can be deported back to her original country.
A legal marriage in other countries is normally recognized in the US unless there is something considered 'wrong' with it. Someone underage marrying an older person would be a bit questionable. Immigration laws and rules would be another very important area to look into.
no, this can't be legal at all. Careful.
Of course not! You can only be married to one person at a time anywhere in the world.