If you register an ID in WXC,

your ID will have an envelop besides your IDs. Click that you can send/receive a private message to/from other people.

I just want to know more detail info about recent B2 visa application. Like:
(1) What question did they ask your father?
(2) How did they know that your father 以前从事的职业和国防有关? You father wrote that in DS157? Or they asked during the interview?