I applied for visitor visa and got an email asking me to give my biometrics at the closest Application Support Center ( I am in USA right now) . The email mentions that I have to give my biometrics within 30 days. How ever it does not give a specific time or place. So do I just show up at the closest Application Support Center with the email and give my bio metrics ? Or do I need to make an appointment for that. I checked all the website but could not find how to make an appointment. I called the USCIS and they said that they do not have any information on that.