I have done my interview and passed on August, 11th 2010. and i still did not receive any mail from USCIS. I was wondering if this is normal. i saw some people on this site said they interviewed and did ceremony the day before my interview date. After I passed the test the lady gave me the certification of the test that i passed and she said im good to go home. but when i was waiting in the lobby for the test i saw people were called up and asked to comeback at 2PM. how come the lady did tell me to comeback at 2PM? is this normal? what should i do??