My husband got his green card in 2001. In May, we moved to a foreign country, not the country of his citizenship. We have no plans of returning to the US in the near future. How long can he be gone before he automatically loses his green card? If he does not want to give it up, what would he need to do in order to keep it? If he does lose it, how difficult would it be to get it back again? I am a US citizen and we have 6 minor children who are all US citizens. Thank you for your help.