謝謝老師!
我也是打算讓他們7/22前回去。
那麽一個新的問題是:應該會在7/22之後才收到最後結果。如果拒了,那麽他們的十年簽證還有效嗎?還是作廢了? -No problem. The visa will still be valid as long as they leave US during the I-539 application for B-2 extension (i.e. before it is denied, if any).