₦airaland Forum

Hi,I have got UK Travel document and I am originally from Iran. I have been invited for a conference in US and the company will fund my travel and accmodation. It is a 3 days conference but I would like to visit a friend and stay with her for atleaster a week after the conference as well.Now I have 2 questions.
Do I need to mention anything about visiting her in my interview?
seems like the officer in airport decides the time I can stay in the US with B1 Visa. So if I obtain 1 month single entry B1 visa then how can I make sure whether the airport officer let me to stay 1 week after the interview? I mean when I don't know what will happen in the airport and teh date of return then how I can book my return ticket?