My uncle is hopefully getting his green card soon through his sister (she file a F4 in 2005). He has two kids under 21 and they are included in the process. My uncle is under the assumption that he can just travel to the US for a couple of weeks every year but hold residence in his home country. I told him that if he doesn't stablish residence in the US he can loose his green card. He said that he really doesn't care but wants for his kids to stay here, his kids also want to remind in the US. My question is, will his kids be able to keep their green cards if their dad leave the US?