Response to EVR_Govinda7 and pvc...
EVR_Govinda7 :
INS is asking for 2 or more Birth witness affidavits. Not neccessarily be Uncle. It can be any elderer who were at the time of your birth. But, you have to clearly explain the releationship between you and your parents with the person gives the affidavits. And also i think "just parents" won\'t be enough. You need to get one from other than parents also. I got 1 from my Dad, 1 from my Dad\'s brother and 1 from my mom\'s brother. Please let me know if you need more info. And also I would send Secondary/Higher Secondary school leaving certificates whcih shows your birth dates. Because these 2 certificates normally issued by Local or state governments.
pvc:
You have 80% change to get an RFE. Pray your god that you want be on other 20% side. It totally depends on IIO. Some IIO\'s don\'t care about dates as long as you have valid BC. But, most of the IIO\'s issues an RFE (asking to submit affidavits) if BC taken recently.