Hi cjack.this is my experience last thursday.i got there on time and i was called in.made me swear and started asking questions like i'm i married now.then comes the 6 standard question.and went thru my applications and made me print my name on it and also made me sign on my pictures.then he gave me a letter asking for additional documentations.which in it self was my fault because i included a copy of my tax returns when i was sending the n400.so he saw that i claimed a child on it and he ask who that child was and i told him is my EX'S and the IO says ok bring me his birth certificate .IO also ask me to submit a court document from home country that i've been supporting my own child for the past 5 yrs.now there's no way i can get that birth certificate.i'm actually considering to go back and tell the IO that i can't get the BC and see what my options will be or just let a lawyer handling this.