I strongly recommend the USC attends the interview with the beneficiary. We can hear the questions from other COs and beneficiaries without USC were definitely asked more questions.
We arrived at 6:00 for the 6:40 appointment. They were very organized and at 6:35 we went to the greeters where we were given plastic bags for our passports. We showed the DS-160 receipt and they were led into the building. I took their phones and went in the US Citizen’s area where they put all the phones in a plastic bin and handed me a equipment check card. They also took my drivers license to put in the bin with all of our phones.