Brian: When Congress cut Tennessee from North Carolina, they had their eyes on one crucial body of water - the Mississippi River. In our rush westward, it didn't matter at the time if all the lines were exactly right.
H. W.: Borders, political borders, can be established with ... not a whole lot of care or concern - if there's nobody there - and that's usually when the border's established. "Okay, nobody's there, we'll just draw the line. Nobody really cares." Then people show up - and they start to care where the border is. But once the border is written on a map, it's very difficult to move it.