If two foreigners come to the US with F-1 and F-2 visas, while they got married in their home country, if they file a divorce request in their own country's embassy and it gets approved and they get divorced by their home country's law:
1- Should the dependent person (F-2 visa holder in this case) leave the US as soon as the divorce is accepted in their home country?
2- If the dependent person wants to get married again but with a US citizen within the US, should s/he file a divorce also in the US or is it not necessary?