Hi My husband is currently sationed in Korea with the army. My son and I want to visit him, but while we are there I would like to get a visa for my son and I to stay there with my husband. Last time my husband was stationed over there we got a A3 visa. Would I have to pay round trip for us to go to Korea, or can I just pay one way for my son and I, being that we want to stay longer in korea with my husband.