Your boss has just told you some news that disturbs you, but a phone call from your spouse distracts you. after you get off the phone, you have a lingering feeling that something is not quite right, but you cannot pinpoint what it is. likely you are reacting to the continued effect of:

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.