How many Americans were on flight MH17?

When Malaysian Airlines flight MH17 was first shot down over Ukraine there were reports that as many as 23 Americans were aboard at the time, but the State Department refused to confirm that number.  President Obama specifically mentioned one American who was killed and now everyone is acting as if that was the only American victim; however, the investigation is still ongoing, and will probably drag on for some time since the investigators are being fired upon.  Not that it really matters, as I'm sure the State Department will drag its feet as long as it possibly can in confirming anything unflattering the investigation might yield.  If the State Department ever does confirm that the initial reports of 23 American deaths were in fact accurate, it will only be long after the next distraction comes along so all this can all get brushed aside as old news.