Reporter's Notebook: Retracing Kentucky's longest tornado

ABC News' Brad Mielke retraced the path of Kentucky's deadly tornado.

Tornadoes have a weird way of playing with luck.

By nature, they're violent and unpredictable. They're also hauntingly specific. They can reduce one person's home to rubble while the house next door is untouched.

Most of them disappear before they can harm anything besides some trees. So when a tornado forms, you hope it dissipates before it hits a population center. You hope to get lucky.

But when you draw a line long enough, eventually your luck runs out.