Unless it has changed recently, the only way to do an interview at the IAH office is be flying in or out that day and be airside.

Yes, I know of the downtown office. We live about 80 miles west of Houston and avoid going downtown if at all possible. So, I'd like to time my wife's interview with a flight and, since she doesn't fly very often, our departure for Europe may be the only chance to do that. That's why I would like to see her GE be up and running by the time we return two weeks later.