Hi,
Here is my history:
1. USCIS send my lawyer a letter for finger printing, which asked me to go to Detroit on 8/21.
2. I went to Alexindra, VA on 7/27 (Tuesday). They didn't allow us and ask us to come on any Wed'day or Sat'day. I went on 7/31 and every thing went smooth.
Try to Sat'day. They will allow you.
