When we reached S.F. airport the officer led us to secretary office of Immigration; after 10 minute the first sentence they said, " you can't stay in US and should return ! ! ! We asked why, they said, "Your visa canceled by state government; after that they prepared a form for us, one of items was that we return by ourself (he said to us " you have two choice, return by yourself or we do it by force " ! ! ! ) . After that they took picture of us and also our fingerprint !!! (we preparing to return and can't understand why they do that )

They gave our passport to cabin crew of return flight and we received our passports in Tehran