I want to know if this is possible, please let me know, thank you.
Yes you can in certain situations. If you are in military, you can walk in anytime after 9 am ET. If you are a civilian, I recommend coming in around 7.30-7.45 am ET mid-week and ask the supervisor if you can give biometrics before your appointment date. It is not guaranteed, but if you come early when it is less crowded you have a good chance of getting in. If you come mid-day you may have to wait long due to existing appointments.
Did You get it before your appoitment?
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