I have a better idea of my wife's experiences during her trip to Moscow for the med exam and dreaded interview.
The problem was not the interview but the med exam at the AOM (the one most folks recommend). I don't know why but they made my wife run all over Moscow (to three different hospitals!) for extra blood work. All tests were normal. I can only speculate that my wife went for a CR-1 visa and that may require more tests than for a K-1 visa.
It is a miracle she made her interview.
