Accompanying someone through non-citizen lane at Customs/Immig.
I am bringing my girlfriend with me when I arrive in the U.S. at Dulles (IAD) tomorrow. She has a tourist visa and speaks only limited English. Do I have to go through the U.S. Citizen Customs/Immigration Line or can I accompany her through the "Visitor" channel? She is a little nervous that they will ask her questions that she won't understand.