As others have stated, the interviews are a partially open file, in that they do not have access to any of your numbers, just your long-answers from AMCAS and your secondary application, so be familiar what you've done (sounds obvious, but it's easy to forget one part or another). One of my interviewers had it printed out, while the other did not have it out, at least that I saw.
Also make sure you think about what you see as the biggest differences between civilian and military medicine, and the benefits - and potential drawbacks - for you personally. However they phrase the questions, they'll want to see that you've really thought through it and that you're going in with your eyes open about what you're getting into.