1) My sister has an American passport, but she only got it when she was an adult
When she went to Brazil as a child, it seems to me that she didn't need her own passport, the travel record was a stamp in my mother's passport (I could be wrong, but I think that's it). I asked my sister to check with my mother, but I highly doubt this passport still exists.
2) I was not aware of the existence of FOIA. I thought it was a great idea and we will certainly do my sister's FOIA.
4) I'm going to call and talk to my mom tonight, and see if she remembers any appointments or tests my sister had.
5) I'll check too
6) I agree, having the I130 as an alternative, she has to start the process. I'm a sponsor to my wife and 2 kids. But I think I can be a co-sponsor for 2 more, I will check.
7) But does my sister has to move together to live in the USA, or can the children come alone (and stay at my house , for example)?