B2 visa expiration time - 3 or 6 monthes

来源: 于 2011-01-12 09:13:35 [旧帖] [给我悄悄话] 本文已被阅读：次

My Parents want to visit me on mid of June. I am wondering when they should apply for the visa? I mean once they get the visa, how long they have to enter US before the visa is expired? Thanks for help.