Americans are always eager to explain the workings of their government, but again you should avoid specifics. National defense and international affairs might get some people angry. Finally, visitors should keep in mind that Americans pride efficiency above all else. Utilitarian by nature, Americans think of almost everything in terms of units to be produced in the most time and cost efficient manner. Although the mentality has served Americans well in the business realm, the attitude might transfer to the social, as well. Visitors might find the strict American timetable too confining, or perhaps downright rude when a casual lunch abruptly ends so the American can rush back to work.